Use the solid color detection to create solid layers

cc/test/fake_content_layer_client.h

Index: cc/test/fake_content_layer_client.h
diff --git a/cc/test/fake_content_layer_client.h b/cc/test/fake_content_layer_client.h
index cc8ddb6f8445862a74dc046e2eaac818e9e839fa..9ca4fdae1ce753592635d235b3a5495ea2e4bb40 100644
--- a/cc/test/fake_content_layer_client.h
+++ b/cc/test/fake_content_layer_client.h
@@ -36,6 +36,9 @@ class FakeContentLayerClient : public ContentLayerClient {
   virtual bool FillsBoundsCompletely() const OVERRIDE;
 
   void set_paint_all_opaque(bool opaque) { paint_all_opaque_ = opaque; }
+  void set_fill_with_nonsolid_color(bool nonsolid) {
+    fill_with_nonsolid_color_ = nonsolid;
+  }
 
   void add_draw_rect(const gfx::RectF& rect, const SkPaint& paint) {
     draw_rects_.push_back(std::make_pair(rect, paint));
@@ -62,6 +65,7 @@ class FakeContentLayerClient : public ContentLayerClient {
   typedef std::vector<BitmapData> BitmapVector;
 
   bool paint_all_opaque_;
+  bool fill_with_nonsolid_color_;
   RectPaintVector draw_rects_;
   BitmapVector draw_bitmaps_;
   SkCanvas* last_canvas_;