Give the browser window's content view a CALayers

chrome/browser/ui/cocoa/nsview_additions.mm

 // Copyright (c) 2012 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.
 
 #include "base/command_line.h"
 #include "base/mac/mac_util.h"
 #import "chrome/browser/ui/cocoa/nsview_additions.h"
 #include "chrome/common/chrome_switches.h"
+#include "ui/base/cocoa/animation_utils.h"
 #include "ui/base/ui_base_switches.h"
 
 #include "base/logging.h"
 
 #if !defined(MAC_OS_X_VERSION_10_7) || \
     MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
 
 @interface NSView (LionAPI)
 - (NSSize)convertSizeFromBacking:(NSSize)size;
 @end
@@ skipping 91 matching lines @@
   if (CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableCoreAnimationLayerSquashing))
     return;
   if (![self respondsToSelector:@selector(setCanDrawSubviewsIntoLayer:)])
     return;
 
   [self setWantsLayer:YES];
   [self setCanDrawSubviewsIntoLayer:YES];
 }
 
+- (void)cr_setHostsSolidWhiteLayer {
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableCoreAnimation))
+    return;
+
+  ScopedCAActionDisabler disabler;
+  CALayer* layer = [[CALayer alloc] init];

[Avi (use Gerrit), 2014/03/05 03:19:28]

This looks like it leaks. scoped_nsobject?

[ccameron, 2014/03/05 07:59:31]

Yes, it does leak. The setLayer will take out a reference, so it can be released
immediately after.

+  [layer setBackgroundColor:CGColorGetConstantColor(kCGColorWhite)];
+  [self setLayer:layer];
+  [self setWantsLayer:YES];
+}
+
 @end