Revert of Use same blob format for internal and external snapshots. (patchset #2 id:20001 of https://codereview.chromium.org/787033002/)

Reason for revert:
[sheriff] breaks http://build.chromium.org/p/client.v8/builders/V8-Blink%20Linux%2064%20%28dbg%29/builds/1293

Original issue's description:
> Use same blob format for internal and external snapshots.
>
> R=vogelheim@chromium.org

TBR=vogelheim@chromium.org,yangguo@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/792563002

Cr-Commit-Position: refs/heads/master@{#25729}

Revert of Do not embed constant functions in StoreTransition stub. (patchset #3 id:40001 of https://codereview.chromium.org/769733003/)

Reason for revert:
GC stress failure: http://build.chromium.org/p/client.v8/builders/V8%20Mac%20GC%20Stress%20-%201/builds/1038

Original issue's description:
> Do not embed constant functions in StoreTransition stub.
>
> BUG=v8:3629
> LOG=N

TBR=ishell@google.com,ishell@chromium.org,ulan@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=v8:3629

Review URL: https://codereview.chromium.org/785253002

Cr-Commit-Position: refs/heads/master@{#25728}

R=vogelheim@chromium.org

Review URL: https://codereview.chromium.org/787033002

Cr-Commit-Position: refs/heads/master@{#25727}

BUG=v8:3629
LOG=N

Review URL: https://codereview.chromium.org/769733003

Cr-Commit-Position: refs/heads/master@{#25726}

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/789773002

Cr-Commit-Position: refs/heads/master@{#25725}

This error is introduced by baafb8f9.

BUG=

Review URL: https://codereview.chromium.org/791543003

Cr-Commit-Position: refs/heads/master@{#25724}

BUG=none
R=machenbach@chromium.org
LOG=n
NOTREECHECKS=true

Review URL: https://codereview.chromium.org/771323006

Cr-Commit-Position: refs/heads/master@{#25723}

TEST=mjsunit/compiler/regress-lena
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/784153006

Cr-Commit-Position: refs/heads/master@{#25722}

R=machenbach@chromium.rg
LOG=n
BUG=none
NOTRY=true

Review URL: https://codereview.chromium.org/786203003

Cr-Commit-Position: refs/heads/master@{#25721}

BUG=none
R=machenbach@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/792513002

Cr-Commit-Position: refs/heads/master@{#25720}

We will remove dependencies in about a week again.

BUG=none
R=machenbach@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/733203008

Cr-Commit-Position: refs/heads/master@{#25719}

Also fix the pushing of JSToBoolean into Phis and generalize it to
also include pushing into Selects.

TEST=cctest,unittests

Review URL: https://codereview.chromium.org/792463003

Cr-Commit-Position: refs/heads/master@{#25718}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/785933002

Cr-Commit-Position: refs/heads/master@{#25717}

TBR=arv@chromium.org
BUG=v8:3744
LOG=N
NOTRY=true

Review URL: https://codereview.chromium.org/746743003

Cr-Commit-Position: refs/heads/master@{#25716}

This was previously landed in commit 8599f5f0, but failed the
collections mjsunit test on ia32 with --deopt-every-n=1. The fixed
patch adds a ClearFlag(HValue::kCanOverflow) call after every
arithmetic operation, which should remove all the deopt points in these
intrinsics.

Ideally, it seems like there should be a way to verify that there are
no deopt points for these inline optimized functions, since there's
nothing to deopt to. But I don't currently know of such a thing.

Review URL: https://codereview.chromium.org/782073002

Cr-Commit-Position: refs/heads/master@{#25715}

R=arv@chromium.org
BUG=v8:3330
LOG=N

Review URL: https://codereview.chromium.org/776563002

Cr-Commit-Position: refs/heads/master@{#25714}

  This test case ( added by git: 4c7effe5 ).
  should has different implementation for Turbofan and crankshaft.

BUG=

Review URL: https://codereview.chromium.org/774163005

Cr-Commit-Position: refs/heads/master@{#25713}

R=yangguo@chromium.org,aandrey@chromium.org
BUG=v8:3743
LOG=N

Review URL: https://codereview.chromium.org/758603004

Cr-Commit-Position: refs/heads/master@{#25712}

The android toolchain for L now has a proper version (21)

BUG=none
TBR=rossberg@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/777273004

Cr-Commit-Position: refs/heads/master@{#25711}

Also remove the now disfunctinal 'builddeps' and 'dependencies' targets

BUG=none
R=machenbach@chromium.org,jkummerow@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/788613002

Cr-Commit-Position: refs/heads/master@{#25710}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/786763002

Cr-Commit-Position: refs/heads/master@{#25709}

Blink already has code for handling invalid cached data. The attached test
ensures that cached data is gracefully rejected if it cannot be used.

This also unifies parser cache and code cache handling.

R=yangguo@chromium.org
BUG=439889
LOG=N

Review URL: https://codereview.chromium.org/781203003

Cr-Commit-Position: refs/heads/master@{#25708}

Use the Operator::kPure flag instead, which determines whether the JS
operator has effect/control edges.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/720233006

Cr-Commit-Position: refs/heads/master@{#25707}

BUG=v8:3742
LOG=N

Review URL: https://codereview.chromium.org/764783003

Cr-Commit-Position: refs/heads/master@{#25706}

BUG=chromium:439868
LOG=N

Review URL: https://codereview.chromium.org/779293003

Cr-Commit-Position: refs/heads/master@{#25705}

R=jarin@chromium.org

BUG=

Review URL: https://codereview.chromium.org/777403003

Cr-Commit-Position: refs/heads/master@{#25704}

R=jochen@chromium.org

Review URL: https://codereview.chromium.org/790433002

Cr-Commit-Position: refs/heads/master@{#25703}

BUG=none
TBR=rossberg@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/788603002

Cr-Commit-Position: refs/heads/master@{#25702}

When compiling with the macro DCHECK_ALWAYS_ON defined, DCHECKs and
supporting code gets compiled and enabled.

This increases test coverage for chromium release buildbots

BUG=v8:3731
R=jkummerow@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/760213005

Cr-Commit-Position: refs/heads/master@{#25701}

BUG=chromium:374740
LOG=n
TEST=python -m unittest run_perf_test
NOTRY=true
TBR=ulan@chromium.org

Review URL: https://codereview.chromium.org/776223003

Cr-Commit-Position: refs/heads/master@{#25700}

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/783913003

Cr-Commit-Position: refs/heads/master@{#25699}

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/786703002

Cr-Commit-Position: refs/heads/master@{#25698}

Review URL: https://codereview.chromium.org/780323002

Cr-Commit-Position: refs/heads/master@{#25697}

Revert of Optimize add/set/delete operations for string keys in Maps and Sets (patchset #1 id:1 of https://codereview.chromium.org/777663003/)

Reason for revert:
Deopt fuzzer reports that something's still broken, reverting until
I can create a minimal repro.

Original issue's description:
> Optimize add/set/delete operations for string keys in Maps and Sets
>
> This was previously landed in commit 66e2f60b, but failed the
> collections mjsunit test with --deopt-every-n=1 due to a typo
> in the shrinking code. This patch corrects and simplifies the
> shrinking logic, and the tests now pass.
>
> R=dslomov@chromium.org
>
> Committed: https://chromium.googlesource.com/v8/v8/+/8599f5f047b4400f7f61de9e449b2246c9aad471

TBR=dslomov@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/742353006

Cr-Commit-Position: refs/heads/master@{#25696}

This was previously landed in commit 66e2f60b, but failed the
collections mjsunit test with --deopt-every-n=1 due to a typo
in the shrinking code. This patch corrects and simplifies the
shrinking logic, and the tests now pass.

R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/777663003

Cr-Commit-Position: refs/heads/master@{#25695}

This introduces Hydrogen for %_GetPrototype. The code falls back on
runtime if the object needs access checks or if its prototype is a
hidden prototype.

BUG=None
LOG=Y
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/756423006

Cr-Commit-Position: refs/heads/master@{#25694}

Port 35ff259b.

BUG=

Review URL: https://codereview.chromium.org/756383005

Cr-Commit-Position: refs/heads/master@{#25693}

Port 35ff259b

Original commit message:
This combines Map::DoneInobjectSlackTracking and Map::ConstructionCount into one more generic 4-bit counter.

Counter values from 15 down to 8 are used for in-object slack tracking, values from 7 down to 0 are free to be used for a new counter when in-object slack tracking is inactive

BUG=

Review URL: https://codereview.chromium.org/780303003

Cr-Commit-Position: refs/heads/master@{#25692}

BUG=421063

Review URL: https://codereview.chromium.org/749213004

Cr-Commit-Position: refs/heads/master@{#25691}

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/779203005

Cr-Commit-Position: refs/heads/master@{#25690}