cc: DelegatedRenderer layer needs a surface if rotated.

cc/delegated_renderer_layer_impl_unittest.cc

Index: cc/delegated_renderer_layer_impl_unittest.cc
diff --git a/cc/delegated_renderer_layer_impl_unittest.cc b/cc/delegated_renderer_layer_impl_unittest.cc
index b9c9b9228dfaf62783659092bb949782afcde2f0..e896658ac6faae5b8f10f18cb96d007e8fb3f0e4 100644
--- a/cc/delegated_renderer_layer_impl_unittest.cc
+++ b/cc/delegated_renderer_layer_impl_unittest.cc
@@ -238,7 +238,7 @@ TEST_F(DelegatedRendererLayerImplTestSimple, DoesNotOwnARenderSurface)
     m_hostImpl->didDrawAllLayers(frame);
 }
 
-TEST_F(DelegatedRendererLayerImplTestSimple, DoesOwnARenderSurface)
+TEST_F(DelegatedRendererLayerImplTestSimple, DoesOwnARenderSurfaceForOpacity)
 {
     m_delegatedRendererLayerPtr->setOpacity(0.5f);
 
@@ -254,6 +254,24 @@ TEST_F(DelegatedRendererLayerImplTestSimple, DoesOwnARenderSurface)
     m_hostImpl->didDrawAllLayers(frame);
 }
 
+TEST_F(DelegatedRendererLayerImplTestSimple, DoesOwnARenderSurfaceForTransform)
+{
+    gfx::Transform rotation;
+    rotation.RotateAboutZAxis(30.0);
+    m_delegatedRendererLayerPtr->setTransform(rotation);
+
+    LayerTreeHostImpl::FrameData frame;
+    EXPECT_TRUE(m_hostImpl->prepareToDraw(frame));
+
+    // This test case has quads from multiple layers in the delegated renderer,
+    // so if the DelegatedRendererLayer has opacity < 1, it should end up with
+    // a render surface.
+    EXPECT_TRUE(m_delegatedRendererLayerPtr->renderSurface());
+
+    m_hostImpl->drawLayers(frame);
+    m_hostImpl->didDrawAllLayers(frame);
+}
+
 class DelegatedRendererLayerImplTestOwnSurface : public DelegatedRendererLayerImplTestSimple {
 public:
     DelegatedRendererLayerImplTestOwnSurface()