cc: Delete the Renderer base class.

cc/output/gl_renderer.h

Index: cc/output/gl_renderer.h
diff --git a/cc/output/gl_renderer.h b/cc/output/gl_renderer.h
index 008161b952854c7bc70527bd9185b28c452b4a02..581fb875c64ef5c1e410b933e630ed452b4f0a84 100644
--- a/cc/output/gl_renderer.h
+++ b/cc/output/gl_renderer.h
@@ -50,7 +50,7 @@ class CC_EXPORT GLRenderer : public DirectRenderer {
   class ScopedUseGrContext;
 
   static std::unique_ptr<GLRenderer> Create(
-      RendererClient* client,
+      DirectRendererClient* client,
       const RendererSettings* settings,
       OutputSurface* output_surface,
       ResourceProvider* resource_provider,
@@ -61,9 +61,6 @@ class CC_EXPORT GLRenderer : public DirectRenderer {
 
   const RendererCapabilitiesImpl& Capabilities() const override;
 
-  // Waits for rendering to finish.
-  void Finish() override;
-
   void SwapBuffers(CompositorFrameMetadata metadata) override;
   void SwapBuffersComplete() override;
 
@@ -73,17 +70,13 @@ class CC_EXPORT GLRenderer : public DirectRenderer {
   virtual bool IsContextLost();
 
  protected:
-  GLRenderer(RendererClient* client,
+  GLRenderer(DirectRendererClient* client,
              const RendererSettings* settings,
              OutputSurface* output_surface,
              ResourceProvider* resource_provider,
              TextureMailboxDeleter* texture_mailbox_deleter,
              int highp_threshold_min);
 
-  void DidChangeVisibility() override;
-
-  bool IsBackbufferDiscarded() const { return is_backbuffer_discarded_; }
-
   const gfx::QuadF& SharedGeometryQuad() const { return shared_geometry_quad_; }
   const StaticGeometryBinding* SharedGeometry() const {
     return shared_geometry_.get();
@@ -257,10 +250,6 @@ class CC_EXPORT GLRenderer : public DirectRenderer {
   void RestoreGLState();
   void RestoreFramebuffer(DrawingFrame* frame);
 
-  void DiscardBackbuffer() override;
-  void EnsureBackbuffer() override;
-  void EnforceMemoryPolicy();
-
   void ScheduleCALayers(DrawingFrame* frame);
   void ScheduleOverlays(DrawingFrame* frame);
 
@@ -499,7 +488,6 @@ class CC_EXPORT GLRenderer : public DirectRenderer {
 
   gfx::Rect swap_buffer_rect_;
   gfx::Rect scissor_rect_;
-  bool is_backbuffer_discarded_;
   bool is_using_bind_uniform_;
   bool is_scissor_enabled_;
   bool scissor_rect_needs_reset_;