cc: Delete the RendererClient class.

cc/test/pixel_test.h

Index: cc/test/pixel_test.h
diff --git a/cc/test/pixel_test.h b/cc/test/pixel_test.h
index be32c6075d94d2632dfa7758c42f804f94fd6d2f..a739c1b9262955aebb2256e0633d7b60bfe1814d 100644
--- a/cc/test/pixel_test.h
+++ b/cc/test/pixel_test.h
@@ -25,7 +25,7 @@ class SoftwareRenderer;
 class TestGpuMemoryBufferManager;
 class TestSharedBitmapManager;
 
-class PixelTest : public testing::Test, public RendererClient {
+class PixelTest : public testing::Test {
  protected:
   PixelTest();
   ~PixelTest() override;
@@ -49,7 +49,6 @@ class PixelTest : public testing::Test, public RendererClient {
   LayerTreeSettings settings_;
   gfx::Size device_viewport_size_;
   bool disable_picture_quad_image_filtering_;
-  class PixelTestRendererClient;
   std::unique_ptr<FakeOutputSurfaceClient> output_surface_client_;
   std::unique_ptr<OutputSurface> output_surface_;
   std::unique_ptr<TestSharedBitmapManager> shared_bitmap_manager_;
@@ -71,9 +70,6 @@ class PixelTest : public testing::Test, public RendererClient {
   void ForceDeviceClip(const gfx::Rect& clip);
   void EnableExternalStencilTest();
 
-  // RendererClient implementation.
-  void SetFullRootLayerDamage() override {}
-
  private:
   void ReadbackResult(base::Closure quit_run_loop,
                       std::unique_ptr<CopyOutputResult> result);
@@ -99,14 +95,12 @@ class RendererPixelTest : public PixelTest {
 // have an externally determined size and offset.
 class GLRendererWithExpandedViewport : public GLRenderer {
  public:
-  GLRendererWithExpandedViewport(RendererClient* client,
-                                 const RendererSettings* settings,
+  GLRendererWithExpandedViewport(const RendererSettings* settings,
                                  OutputSurface* output_surface,
                                  ResourceProvider* resource_provider,
                                  TextureMailboxDeleter* texture_mailbox_deleter,
                                  int highp_threshold_min)
-      : GLRenderer(client,
-                   settings,
+      : GLRenderer(settings,
                    output_surface,
                    resource_provider,
                    texture_mailbox_deleter,
@@ -115,23 +109,20 @@ class GLRendererWithExpandedViewport : public GLRenderer {
 
 class SoftwareRendererWithExpandedViewport : public SoftwareRenderer {
  public:
-  SoftwareRendererWithExpandedViewport(RendererClient* client,
-                                       const RendererSettings* settings,
+  SoftwareRendererWithExpandedViewport(const RendererSettings* settings,
                                        OutputSurface* output_surface,
                                        ResourceProvider* resource_provider)
-      : SoftwareRenderer(client, settings, output_surface, resource_provider) {}
+      : SoftwareRenderer(settings, output_surface, resource_provider) {}
 };
 
 class GLRendererWithFlippedSurface : public GLRenderer {
  public:
-  GLRendererWithFlippedSurface(RendererClient* client,
-                               const RendererSettings* settings,
+  GLRendererWithFlippedSurface(const RendererSettings* settings,
                                OutputSurface* output_surface,
                                ResourceProvider* resource_provider,
                                TextureMailboxDeleter* texture_mailbox_deleter,
                                int highp_threshold_min)
-      : GLRenderer(client,
-                   settings,
+      : GLRenderer(settings,
                    output_surface,
                    resource_provider,
                    texture_mailbox_deleter,