Mac: Deflake AppListServiceInteractiveTest.SwitchAppListProfilesDuringSearch

ui/app_list/cocoa/apps_search_results_controller.mm

 // Copyright 2013 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 "ui/app_list/cocoa/apps_search_results_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
+#include "base/message_loop/message_loop.h"
 #include "base/strings/sys_string_conversions.h"
 #include "skia/ext/skia_utils_mac.h"
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/app_list_model.h"
 #import "ui/app_list/cocoa/apps_search_results_model_bridge.h"
 #include "ui/app_list/search_result.h"
 #import "ui/base/cocoa/flipped_view.h"
 #include "ui/gfx/image/image_skia_util_mac.h"
 
 namespace {
@@ skipping 375 matching lines @@
 
 @end
 
 @implementation AppsSearchResultsTableView
 
 - (AppsSearchResultsController*)controller {
   return base::mac::ObjCCastStrict<AppsSearchResultsController>(
       [self delegate]);
 }
 
+- (BOOL)canDraw {
+  // AppKit doesn't call -[NSView canDrawConcurrently] which would have told it
+  // that this is unsafe. Returning true from canDraw only if there is a message
+  // loop ensures that no drawing occurs on a background thread. Without this,
+  // ImageSkia can assert when trying to get bitmaps. http://crbug.com/417148.
+  // This means unit tests will always return 'NO', but that's OK.
+  return !!base::MessageLoop::current() && [super canDraw];
+}
+
 - (void)mouseDown:(NSEvent*)theEvent {
   [[self controller] mouseDown:theEvent];
   [super mouseDown:theEvent];
 }
 
 - (NSMenu*)menuForEvent:(NSEvent*)theEvent {
   NSPoint pointInView = [self convertPoint:[theEvent locationInWindow]
                                   fromView:nil];
   return [[self controller] contextMenuForRow:[self rowAtPoint:pointInView]];
 }
@@ skipping 40 matching lines @@
       std::min(iconSize.height, kIconDimension));
   [resultIcon drawInRect:iconRect
                 fromRect:NSZeroRect
                operation:NSCompositeSourceOver
                 fraction:1.0
           respectFlipped:YES
                    hints:nil];
 }
 
 @end