Fix a long standing painting problem seen in the tabstrip on Windows Desktop Chrome.

Fix a long standing painting problem seen in the tabstrip on Windows Desktop Chrome.

The problem appears when we switch away from an installed theme to glass while in fullscreen mode. Debugging this revealed the following:-

1. Windows sends the WM_DWMNCRENDERINGCHANGED message when DWM
   NC rendering is enabled or disabled for a window. The wParam
   in the message indicates if NC rendering is enabled.

2. In fullscreen mode if we attempt to transition a window to
   DWM we get the above message with wParam as TRUE which
   indicates that DWM is enabled. However we eventually receive
   this message again with wParam as FALSE indicating that DWM
   is turned off for the window. Some windbg debugging revealed
   that there is a function in the themes dll which turns off
   DWM for fullscreen windows.

The painting problem occurs because we think we are in DWM and Windows does not.

Attempted fix is to delay the DWM portion of the themes change until the window comes out of fullscreen mode.

BUG=404564
R=sky@chromium.org

Review URL: https://codereview.chromium.org/484963002

Cr-Commit-Position: refs/heads/master@{#290941}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@290941 0039d316-1c4b-4281-b951-d872f2087c98