cc, gpu: Use RGBA when using msaa on systems that don't support BGRA

cc/tiles/tile_draw_info.h

 // 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.
 
 #ifndef CC_TILES_TILE_DRAW_INFO_H_
 #define CC_TILES_TILE_DRAW_INFO_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "cc/raster/tile_task_runner.h"
@@ skipping 47 matching lines @@
     DCHECK(mode_ == RESOURCE_MODE);
     DCHECK(resource_);
     return resource_->size();
   }
 
   SkColor solid_color() const {
     DCHECK(mode_ == SOLID_COLOR_MODE);
     return solid_color_;
   }
 
-  bool contents_swizzled() const {
-    DCHECK(resource_);
-    return !PlatformColor::SameComponentOrder(resource_->format());
-  }
+  bool contents_swizzled() const { return contents_swizzled_; }
 
   bool requires_resource() const {
     return mode_ == RESOURCE_MODE || mode_ == OOM_MODE;
   }
 
   inline bool has_resource() const { return !!resource_; }
 
   void SetSolidColorForTesting(SkColor color) { set_solid_color(color); }
   void SetResourceForTesting(scoped_ptr<ScopedResource> resource) {
     resource_ = resource.Pass();
@@ skipping 10 matching lines @@
   void set_solid_color(const SkColor& color) {
     mode_ = SOLID_COLOR_MODE;
     solid_color_ = color;
   }
 
   void set_oom() { mode_ = OOM_MODE; }
 
   Mode mode_;
   SkColor solid_color_;
   scoped_ptr<ScopedResource> resource_;
+  bool contents_swizzled_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_TILE_DRAW_INFO_H_