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

app/app.gyp

@@ -59,7 +59,6 @@
         'sql/statement_unittest.cc',
         'sql/transaction_unittest.cc',
         'test_suite.h',
-        'win/win_util_unittest.cc',
       ],
       'include_dirs': [
         '..',
@@ -79,7 +78,6 @@
           'sources!': [
             '../ui/base/dragdrop/os_exchange_data_win_unittest.cc',
             '../ui/base/view_prop_unittest.cc',
-            'win_util_unittest.cc',
           ],
         }],
         ['OS =="linux" or OS =="freebsd"', {

app/app_base.gypi

@@ -160,6 +160,8 @@
         '../ui/base/l10n/l10n_util_win.cc',
         '../ui/base/l10n/l10n_util_win.h',
         '../ui/base/message_box_flags.h',
+        '../ui/base/message_box_win.cc',
+        '../ui/base/message_box_win.h',
         '../ui/base/models/accelerator.h',
         '../ui/base/models/accelerator_gtk.h',
         '../ui/base/models/accelerator_cocoa.h',
@@ -242,8 +244,6 @@
         'win/scoped_prop.h',
         'win/shell.cc',
         'win/shell.h',
-        'win/win_util.cc',
-        'win/win_util.h',
         '<(gl_binding_output_dir)/gl_bindings_autogen_gl.cc',
         '<(gl_binding_output_dir)/gl_bindings_autogen_gl.h',
         '<(gl_binding_output_dir)/gl_bindings_autogen_mock.cc',