mac: Fix tab dragging visual bug in Yosemite. (reland 2)

chrome/browser/ui/cocoa/browser_window_controller_unittest.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.
 
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 
 #include "base/mac/mac_util.h"
 #import "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/signin/fake_signin_manager.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "chrome/browser/sync/profile_sync_service_mock.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/cocoa/cocoa_profile_test.h"
 #include "chrome/browser/ui/cocoa/find_bar/find_bar_bridge.h"
+#import "chrome/browser/ui/cocoa/nsview_additions.h"
 #include "chrome/browser/ui/cocoa/tabs/tab_strip_view.h"
 #import "chrome/browser/ui/cocoa/toolbar/toolbar_controller.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_profile.h"
 #include "components/signin/core/browser/fake_auth_status_provider.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_error_controller.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "content/public/browser/notification_service.h"
@@ skipping 574 matching lines @@
   EXPECT_EQ(screenFrame.size.height, zoomFrame.size.height);
   EXPECT_EQ(testFrame.origin.x, zoomFrame.origin.x);
   EXPECT_EQ(screenFrame.origin.y, zoomFrame.origin.y);
 }
 
 TEST_F(BrowserWindowControllerTest, TestFindBarOnTop) {
   FindBarBridge bridge(NULL);
   [controller_ addFindBar:bridge.find_bar_cocoa_controller()];
 
   // Test that the Z-order of the find bar is on top of everything.
-  NSArray* subviews = [[[controller_ window] contentView] subviews];
+  NSArray* subviews = [controller_.chromeContentView subviews];
   NSUInteger findBar_index =
       [subviews indexOfObject:[controller_ findBarView]];
   EXPECT_NE(NSNotFound, findBar_index);
   NSUInteger toolbar_index =
       [subviews indexOfObject:[controller_ toolbarView]];
   EXPECT_NE(NSNotFound, toolbar_index);
   NSUInteger bookmark_index =
       [subviews indexOfObject:[controller_ bookmarkView]];
   EXPECT_NE(NSNotFound, bookmark_index);
 
@@ skipping 245 matching lines @@
 // looks at the window's frame.
 - (NSWindow*)createFullscreenWindow {
   if (testFullscreenWindow_.get())
     return testFullscreenWindow_.get();
 
   testFullscreenWindow_.reset(
       [[NSWindow alloc] initWithContentRect:NSMakeRect(0,0,400,400)
                                   styleMask:NSBorderlessWindowMask
                                     backing:NSBackingStoreBuffered
                                       defer:NO]);
+  [[testFullscreenWindow_ contentView] cr_setWantsLayer:YES];
   return testFullscreenWindow_.get();
 }
 @end
 
 /* TODO(???): test other methods of BrowserWindowController */