cc: Use the size of the source frame along with the source frame's renderpasses

cc/delegated_renderer_layer_impl.cc

Index: cc/delegated_renderer_layer_impl.cc
diff --git a/cc/delegated_renderer_layer_impl.cc b/cc/delegated_renderer_layer_impl.cc
index f5a1d04cccc4d712c62630000a3d5533587b9b99..be107bb054ad309189da04ad4324dacde46aba2e 100644
--- a/cc/delegated_renderer_layer_impl.cc
+++ b/cc/delegated_renderer_layer_impl.cc
@@ -35,7 +35,7 @@ bool DelegatedRendererLayerImpl::hasContributingDelegatedRenderPasses() const
     return m_renderPassesInDrawOrder.size() > 1;
 }
 
-void DelegatedRendererLayerImpl::setRenderPasses(ScopedPtrVector<RenderPass>& renderPassesInDrawOrder)
+void DelegatedRendererLayerImpl::setRenderPasses(ScopedPtrVector<RenderPass>& renderPassesInDrawOrder, gfx::Size frameSize)
 {
     gfx::RectF oldRootDamage;
     if (!m_renderPassesInDrawOrder.isEmpty())
@@ -51,6 +51,8 @@ void DelegatedRendererLayerImpl::setRenderPasses(ScopedPtrVector<RenderPass>& re
 
     if (!m_renderPassesInDrawOrder.isEmpty())
         m_renderPassesInDrawOrder.last()->damage_rect.Union(oldRootDamage);
+
+    m_frameSize = frameSize;
 }
 
 void DelegatedRendererLayerImpl::clearRenderPasses()
@@ -145,7 +147,12 @@ void DelegatedRendererLayerImpl::appendRenderPassQuads(QuadSink& quadSink, Appen
               // This layer must be drawing to a renderTarget other than itself.
               DCHECK(renderTarget() != this);
 
-              copiedSharedQuadState->content_to_target_transform = drawTransform() * copiedSharedQuadState->content_to_target_transform;
+              gfx::Transform delegatedFrameToLayerSpaceTransform;
+              delegatedFrameToLayerSpaceTransform.Scale(
+                  static_cast<double>(m_frameSize.width()) / bounds().width(),
+                  static_cast<double>(m_frameSize.height()) / bounds().height());
+
+              copiedSharedQuadState->content_to_target_transform = drawTransform() * delegatedFrameToLayerSpaceTransform * copiedSharedQuadState->content_to_target_transform;
               copiedSharedQuadState->clipped_rect_in_target = MathUtil::mapClippedRect(drawTransform(), copiedSharedQuadState->clipped_rect_in_target);
               copiedSharedQuadState->clip_rect = MathUtil::mapClippedRect(drawTransform(), copiedSharedQuadState->clip_rect);
               copiedSharedQuadState->opacity *= drawOpacity();