Implement transform/clip support for Android WebView.

cc/output/renderer_pixeltest.cc

Index: cc/output/renderer_pixeltest.cc
diff --git a/cc/output/renderer_pixeltest.cc b/cc/output/renderer_pixeltest.cc
index d479e5fb2e1c1a5a5e4323935d01cf7549341611..2faa0d08fb6cc29b40c40cc37dba3db87b3395a6 100644
--- a/cc/output/renderer_pixeltest.cc
+++ b/cc/output/renderer_pixeltest.cc
@@ -94,7 +94,10 @@ scoped_ptr<DrawQuad> CreateTestRenderPassDrawQuad(
   return quad.PassAs<DrawQuad>();
 }
 
-typedef ::testing::Types<GLRenderer, SoftwareRenderer> RendererTypes;
+typedef ::testing::Types<GLRenderer,
+                         SoftwareRenderer,
+                         GLRendererWithExpandedViewport,
+                         SoftwareRendererWithExpandedViewport> RendererTypes;
 TYPED_TEST_CASE(RendererPixelTest, RendererTypes);
 
 typedef ::testing::Types<GLRenderer,
@@ -135,6 +138,14 @@ bool FuzzyForSoftwareOnlyPixelComparator<SoftwareRenderer>::Compare(
   return fuzzy_.Compare(actual_bmp, expected_bmp);
 }
 
+template <>
+bool FuzzyForSoftwareOnlyPixelComparator<
+    SoftwareRendererWithExpandedViewport>::Compare(
+    const SkBitmap& actual_bmp,
+    const SkBitmap& expected_bmp) const {
+  return fuzzy_.Compare(actual_bmp, expected_bmp);
+}
+
 template<typename RendererType>
 bool FuzzyForSoftwareOnlyPixelComparator<RendererType>::Compare(
     const SkBitmap& actual_bmp,