There were some functions that were used when atomic floats were supported, but
can now be removed.

BUG=

Review URL: https://codereview.chromium.org/1552683003

Cr-Commit-Position: refs/heads/master@{#33093}

BUG=497295
LOG=n

Review URL: https://codereview.chromium.org/1422533009

Cr-Commit-Position: refs/heads/master@{#32064}

This enables linter checking for "readability/namespace" violations
during presubmit and instead marks the few known exceptions that we
allow explicitly.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1371083003

Cr-Commit-Position: refs/heads/master@{#31019}

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1318713007

Cr-Commit-Position: refs/heads/master@{#30755}

R=binji@chromium.org

Review URL: https://codereview.chromium.org/1327743004

Cr-Commit-Position: refs/heads/master@{#30663}

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1293053004

Cr-Commit-Position: refs/heads/master@{#30232}

BUG=v8:4366
LOG=n

Review URL: https://codereview.chromium.org/1287543004

Cr-Commit-Position: refs/heads/master@{#30138}

For unclear and probably accidental reasons the Windows 10 SDK
renamed some _Interlocked* functions to _InlineInterlocked. This
leads to these errors:

runtime-atomics.cc(159): error C3861: '_InterlockedExchange64': identifier not found
runtime-atomics.cc(159): error C3861: '_InterlockedExchangeAdd64': identifier not found
runtime-atomics.cc(159): error C3861: '_InterlockedAnd64': identifier not found
runtime-atomics.cc(159): error C3861: '_InterlockedOr64': identifier not found
runtime-atomics.cc(159): error C3861: '_InterlockedXor64': identifier not found

Fixing this requires either adding defines to map these five _Interlocked*
functions to _InlineInterlocked*, or else changing to using the
non-underscore versions. It appears that using the non-underscore versions
is preferable so I went that way. This also requires adding three  new
defines because there is a huge lack of consistency, probably due to these
macros being defined sometimes in <intrin.h> and sometimes in <winnt.h>

All five of the renamed 64-bit functions were manually checked to ensure
that the change to the non-underscore versions would make no differences -
the inline functions that they map to were identical. Other functions were
spot-checked.

Also, the 'volatile' qualifiers were removed. Volatile has no no useful
meaning for multi-threaded programming. It only exists in the Interlocked*
prototypes to *allow* volatile variables to be passed. Since this is a bad
habit to encourage there is no reason for us to permit it, and we can
still call the Microsoft functions (T* converts to volatile T*, just not
vice-versa).

The updated code builds with the Windows 8.1 SDK and with the Windows 10 SDK.

R=jarin@chromium.org
LOG=Y
BUG=440500,491424

Review URL: https://codereview.chromium.org/1228063005

Cr-Commit-Position: refs/heads/master@{#29687}

BUG=chromium:497295
R=jarin@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1201543002

Cr-Commit-Position: refs/heads/master@{#29199}

Don't DCHECK in the atomic runtime functions.

BUG=chromium:501809,chromium:497295
R=jarin@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1189223003

Cr-Commit-Position: refs/heads/master@{#29159}

This is behind the flag "--harmony-atomics", and it only works on
SharedArrayBuffers. This implementation only includes the runtime functions.
The TurboFan implementation will be next.

The draft spec for Atomics can be found here:
https://docs.google.com/document/d/1NDGA_gZJ7M7w1Bh8S0AoDyEqwDdRh4uSoTPSNn77PFk

BUG=
LOG=n

Review URL: https://codereview.chromium.org/1162503002

Cr-Commit-Position: refs/heads/master@{#28796}