This disables notification of wasm script 'compilation' since
OnAfterCompile actually triggers a JS call (which is disallowed during
stack trace collection).

BUG=641065

Review-Url: https://codereview.chromium.org/2304943002
Cr-Commit-Position: refs/heads/master@{#39139}

This stores the wasm object and the function index in the script, and
adds functions to get the disassembled wasm code as well as the offset
table mapping from byte position to line and column in the disassembly
solely from the script.
This will be used to show "ui source code" in DevTools, and map raw
locations from the stack trace into this code view.

R=yangguo@chromium.org, ahaas@chromium.org, titzer@chromium.org
BUG=chromium:613110

patch from issue 2063013004 at patchset 80001 (http://crrev.com/2063013004#ps80001)

Review-Url: https://codereview.chromium.org/2105303002
Cr-Commit-Position: refs/heads/master@{#37430}

This changes many interfaces to accept StandardFrames instead of
JavaScriptFrames, and use the StackTraceFrameIterator instead of the
JavaScriptFrameIterator.
Also, the detailed frame information array now contains the script in
addition to the function, as wasm frames are not associated to any
javascript function.

This is a rebase of (https://codereview.chromium.org/2069823003/), since clemensh's internship has ended.

R=yangguo@chromium.org,ahaas@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2109093003
Cr-Commit-Position: refs/heads/master@{#37379}

All function which potentially do heap allocations now take a Handle
on a WasmDebugInfo. This unfortunately requires to make some function
static, since otherwise the "this" pointer would not be handlified.

R=ahaas@chromium.org, titzer@chromium.org
BUG=chromium:613110

Review-Url: https://codereview.chromium.org/2074933005
Cr-Commit-Position: refs/heads/master@{#37099}

All debugging-related information is now stored inside a dedicated
object, which is only allocated if debugging support is needed.
This is also where later a reference to the interpreter will be stored
for executing to-be-debugged functions and providing stack inspection.

R=titzer@chromium.org, ahaas@chromium.org
BUG=chromium:613110

Review-Url: https://codereview.chromium.org/2050953003
Cr-Commit-Position: refs/heads/master@{#37055}