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

cc/tiles/tile_draw_info.h

Index: cc/tiles/tile_draw_info.h
diff --git a/cc/tiles/tile_draw_info.h b/cc/tiles/tile_draw_info.h
index 9ba8f24fb4287ce206f08f3e4879c4f78c7fbfa9..e11da9cbdcf28b7dfe093b291dbdf2b22afdb736 100644
--- a/cc/tiles/tile_draw_info.h
+++ b/cc/tiles/tile_draw_info.h
@@ -65,10 +65,7 @@ class CC_EXPORT TileDrawInfo {
     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;
@@ -99,6 +96,7 @@ class CC_EXPORT TileDrawInfo {
   Mode mode_;
   SkColor solid_color_;
   scoped_ptr<ScopedResource> resource_;
+  bool contents_swizzled_;
 };
 
 }  // namespace cc