Bug 963962 - Fix use of CreateDrawTargetForData in CanvasLayerD3D9/10. r=Bas

gfx/layers/d3d10/CanvasLayerD3D10.cpp

@@ -145,9 +145,10 @@ CanvasLayerD3D10::UpdateSurface()
         DataSourceSurface* frameData = shareSurf->GetData();
         // Scope for DrawTarget, so it's destroyed before Unmap.
         {
+          IntSize boundsSize(mBounds.width, mBounds.height);
           RefPtr<DrawTarget> mapDt = Factory::CreateDrawTargetForData(BackendType::CAIRO,
                                                                       (uint8_t*)map.pData,
-                                                                      frameData->GetSize(),
+                                                                      boundsSize,
                                                                       map.RowPitch,
                                                                       SurfaceFormat::B8G8R8A8);
 

gfx/layers/d3d9/CanvasLayerD3D9.cpp

@@ -98,9 +98,10 @@ CanvasLayerD3D9::UpdateSurface()
   }
 
   D3DLOCKED_RECT rect = textureLock.GetLockRect();
+  IntSize boundsSize(mBounds.width, mBounds.height);
   RefPtr<DrawTarget> rectDt = Factory::CreateDrawTargetForData(BackendType::CAIRO,
                                                                (uint8_t*)rect.pBits,
-                                                               surface->GetSize(),
+                                                               boundsSize,
                                                                rect.Pitch,
                                                                SurfaceFormat::B8G8R8A8);