| Index: cc/layers/tiled_layer.cc | 
| diff --git a/cc/layers/tiled_layer.cc b/cc/layers/tiled_layer.cc | 
| index 25074700f95231fb760bb4fea087fd730e27ef09..d4ec763faea48164e8e7e682f90e4fe4c989297c 100644 | 
| --- a/cc/layers/tiled_layer.cc | 
| +++ b/cc/layers/tiled_layer.cc | 
| @@ -686,7 +686,7 @@ void TiledLayer::ResetUpdateState() { | 
| } | 
|  | 
| namespace { | 
| -gfx::Rect ExpandRectByDelta(const gfx::Rect& rect, gfx::Vector2d delta) { | 
| +gfx::Rect ExpandRectByDelta(const gfx::Rect& rect, const gfx::Vector2d& delta) { | 
| int width = rect.width() + std::abs(delta.x()); | 
| int height = rect.height() + std::abs(delta.y()); | 
| int x = rect.x() + ((delta.x() < 0) ? delta.x() : 0); | 
|  |