Cross-platform CL to remove app/win/win_util.h&cc and related work.
See Issue 70141 for the full move details; see my inline review comments.

Changes significantly different from or beyond those prescribed by the bug:
*Consolidated a lot of GrabWindowSnapshot code.
*Moved EnsureRectIsVisibleInRect to views::internal namespace for test access.
*Moved app/win/win_util_unittest.cc to views/window/window_win_unittest.h
*Named ui/base/message_box_win.h instead of ui/base/message_box.h
*Made WindowWin::GetWindowTitleFont static; needed in static contexts.
*Denoted WindowWin::FrameTypeChanged as a Window override, moved code.
*Moved TestGrabWindowSnapshot into new file: chrome/browser/ui/window_snapshot/window_snapshot_mac_unittest.mm

BUG=70141
TEST=none

Review URL: http://codereview.chromium.org/6386009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@73589 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 6ac0a59..7eded716 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -3530,6 +3530,10 @@
         'browser/ui/window_sizer_linux.cc',
         'browser/ui/window_sizer_mac.mm',
         'browser/ui/window_sizer_win.cc',
+        'browser/ui/window_snapshot/window_snapshot.h',
+        'browser/ui/window_snapshot/window_snapshot_mac.mm',
+        'browser/ui/window_snapshot/window_snapshot_win.cc',
+        'browser/ui/window_snapshot/window_snapshot_x.cc',
         'browser/upgrade_detector.cc',
         'browser/upgrade_detector.h',
         'browser/user_style_sheet_watcher.cc',