Only notify V8 once per timezone change

Only notify V8 once per timezone change

The timezone is a global property. No need to notify V8 for every single
frame.

As a side-effect, we don't have a race with context creation.

BUG=348856
R=marja@chromium.org, kalman@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=255928

[marja, 2014-03-10 10:36:19]

lgtm, I believe this is the right fix.

[jochen (gone - plz use gerrit), 2014-03-10 10:43:06]

The CQ bit was checked by jochen@chromium.org

[commit-bot: I haz the power, 2014-03-10 10:43:11]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jochen@chromium.org/190763008/1

[jochen (gone - plz use gerrit), 2014-03-10 11:03:30]

(note that the IPC message should actually be a control message and be handled
by the render process)

[commit-bot: I haz the power, 2014-03-10 12:00:03]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-03-10 12:00:03]

Try jobs failed on following builders: linux_chromium_rel

[jochen (gone - plz use gerrit), 2014-03-10 12:49:48]

The CQ bit was checked by jochen@chromium.org

[jochen (gone - plz use gerrit), 2014-03-10 12:56:24]

Committed patchset #1 manually as r255928 (presubmit successful).

[commit-bot: I haz the power, 2014-03-10 12:59:49]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jochen@chromium.org/190763008/1

[commit-bot: I haz the power, 2014-03-10 12:59:51]

Failed to apply patch for content/renderer/render_frame_impl.cc:
While running patch -p1 --forward --force --no-backup-if-mismatch;
  patching file content/renderer/render_frame_impl.cc
  Hunk #1 FAILED at 592.
  1 out of 1 hunk FAILED -- saving rejects to file
content/renderer/render_frame_impl.cc.rej

Patch:       content/renderer/render_frame_impl.cc
Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc
b/content/renderer/render_frame_impl.cc
index
6200b3480aa2e5a38f255e3c412fc817cb30a73f..99518d9b26a4649c8214f6055d9e0387167901a3
100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -592,7 +592,7 @@ void RenderFrameImpl::OnNavigate(const
FrameMsg_Navigate_Params& params) {
     // We refresh timezone when a view is swapped in since timezone
     // can get out of sync when the system timezone is updated while
     // the view is swapped out.
-    RenderViewImpl::NotifyTimezoneChange(render_view_->webview()->mainFrame());
+    RenderViewImpl::NotifyTimezoneChange();
 
     render_view_->SetSwappedOut(false);
     is_swapped_out_ = false;