Do not call into blink before initialization

Do not call into blink before initialization

OnMemoryPressure can be called before blink is initialized, which can
cause a crash. See bug for details.

BUG=374211
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=271216

[boliu, 2014-05-16 16:31:15]

PTAL, thanks!

https://codereview.chromium.org/292523002/diff/1/content/renderer/render_thre...
File content/renderer/render_thread_impl.cc (right):

https://codereview.chromium.org/292523002/diff/1/content/renderer/render_thre...
content/renderer/render_thread_impl.cc:1421: v8::V8::LowMemoryNotification();
Could skip v8 and skia as well if blink is not initialized, but apparently they
can handle these calls without blink init, so kept this fix small.

[piman, 2014-05-16 19:31:42]

lgtm

[boliu, 2014-05-16 19:32:36]

The CQ bit was checked by boliu@chromium.org

[commit-bot: I haz the power, 2014-05-16 19:33:33]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/boliu@chromium.org/292523002/1

[commit-bot: I haz the power, 2014-05-17 07:46:00]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  linux_chromium_chromeos_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_chrome...)

[commit-bot: I haz the power, 2014-05-17 16:00:49]

Change committed as 271216