Revert 41316 - gtk: Only notify the TabContents that the browser window has moved or resized if the window has actually moved or resized.  This fixes a ~20ms startup performance regression.
Revert 41316 - gtk: Only notify the TabContents that the browser window has moved or resized if the window has actually moved or resized.  This fixes a ~20ms startup performance regression.

BUG=37975
TEST=none
TBR=jhawkins@chromium.org
Review URL: http://codereview.chromium.org/868002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@41328 0039d316-1c4b-4281-b951-d872f2087c98

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