This prepares for pulling chromium's build as dependency for
gn. After this, the files in build and gypfiles need to stay
in sync until chromium is updated.

BUG=chromium:474921
LOG=n

Review-Url: https://codereview.chromium.org/1848553003
Cr-Commit-Position: refs/heads/master@{#35898}

This will allow to pull in gyp as a deps to the same location
as chromium (tools/gyp not build/gyp), needed for gn switch.

This is the first step of a 3-way move.
1) Copy v8.gyp in v8
2) Update references in embedders (follow up)
3) Remove old v8.gyp (follow up)

BUG=chromium:474921
LOG=n
NOTRY=true

Review URL: https://codereview.chromium.org/1920793002

Cr-Commit-Position: refs/heads/master@{#35760}

Fixing a memory leak in CompileAndRunModule.

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=wasm-fuzzer
R=jochen@chromium.org,jarin@chromium.org,kcc@chromium.org,machenbach@chromium.org,titzer@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/1738943004

Cr-Commit-Position: refs/heads/master@{#34415}

BUG=chromium:577261
R=machenbach@chromium.org,yangguo@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1652963002

Cr-Commit-Position: refs/heads/master@{#33673}

R=jochen@chromium.org
BUG=chromium:577261
LOG=N

Review URL: https://codereview.chromium.org/1655853002

Cr-Commit-Position: refs/heads/master@{#33640}

BUG=chromium:577261
R=machenbach@chromium.org,jarin@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1604203002

Cr-Commit-Position: refs/heads/master@{#33508}