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Previously time calculations based on "now"-time taken when renderer processed resource notification messages.

Renderer time is calculated by interpolation based on taken values. Because of long JS evaluation or heavy rendering, "renderer" time range might be skewed.

To fix situation, "renderer" time should be taken when IPC messages are processed by renderer IO thread.

This patch adds message filter that supplies aforementioned messages with timestamps.


BUG=223836

Review URL: https://chromiumcodereview.appspot.com/14646006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@202870 0039d316-1c4b-4281-b951-d872f2087c98