[Mac] Use NSThemeFrame instead of NSGrayFrame on 10.8.

chrome/browser/ui/cocoa/browser_frame_view.mm

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/browser_frame_view.h"
 
 #import <objc/runtime.h>
 #import <Carbon/Carbon.h>
 
 #include "base/logging.h"
+#include "base/mac/mac_util.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
 #import "chrome/browser/themes/theme_service.h"
 #import "chrome/browser/ui/cocoa/framed_browser_window.h"
 #import "chrome/browser/ui/cocoa/themed_window.h"
 #include "grit/theme_resources.h"
 #include "grit/theme_resources_standard.h"
 
 static const CGFloat kBrowserFrameViewPaintHeight = 60.0;
 static const NSPoint kBrowserFrameViewPatternPhaseOffset = { -5, 3 };
 
@@ skipping 18 matching lines @@
 
 @implementation BrowserFrameView
 
 + (void)load {
   // This is where we swizzle drawRect, and add in two methods that we
   // need. If any of these fail it shouldn't affect the functionality of the
   // others. If they all fail, we will lose window frame theming and
   // roll overs for our close widgets, but things should still function
   // correctly.
   base::mac::ScopedNSAutoreleasePool pool;
-  Class grayFrameClass = NSClassFromString(@"NSGrayFrame");
+
+  // On 10.8+ textured windows are no longer drawn by NSGrayFrame, and

[Avi (use Gerrit), 2012/03/14 02:17:50]

I didn't know that we were using textured windows. "...the window background is
no longer drawn..."?

[Robert Sesek, 2012/03/14 15:00:29]

Done.

Textured windows are the easiest way to not get the titlebar drawn.

+  // NSThemeFrame is used instead <http://crbug.com/114745>.
+  Class grayFrameClass = NSClassFromString(

[Avi (use Gerrit), 2012/03/14 02:17:50]

variable rename?

[Robert Sesek, 2012/03/14 15:00:29]

Done.

+      base::mac::IsOSMountainLionOrLater() ? @"NSThemeFrame" : @"NSGrayFrame");
   DCHECK(grayFrameClass);
   if (!grayFrameClass) return;
 
   // Exchange draw rect.
   Method m0 = class_getInstanceMethod([self class], @selector(drawRect:));
   DCHECK(m0);
   if (m0) {
     BOOL didAdd = class_addMethod(grayFrameClass,
                                   @selector(drawRectOriginal:),
                                   method_getImplementation(m0),
@@ skipping 286 matching lines @@
 
   // If this isn't the window class we expect, then pass it on to the
   // original implementation.
   if (![[self window] isKindOfClass:[FramedBrowserWindow class]])
     return [self _shadowFlagsOriginal];
 
   return [self _shadowFlagsOriginal] | 128;
 }
 
 @end