cc: Make most of cc::OutputSurface abstract.

content/browser/renderer_host/compositor_impl_android.cc

Index: content/browser/renderer_host/compositor_impl_android.cc
diff --git a/content/browser/renderer_host/compositor_impl_android.cc b/content/browser/renderer_host/compositor_impl_android.cc
index 68ad85967f11f89cd566bbd3496f778b60f3f3f7..2cc5175e4e4ce49619b018643bea8d6082c5a3c4 100644
--- a/content/browser/renderer_host/compositor_impl_android.cc
+++ b/content/browser/renderer_host/compositor_impl_android.cc
@@ -254,10 +254,26 @@ class AndroidOutputSurface : public cc::OutputSurface {
     return true;
   }
 
+  void EnsureBackbuffer() override {}
+
+  void DiscardBackbuffer() override {
+    context_provider()->ContextGL()->DiscardBackbufferCHROMIUM();
+  }
+
+  void BindFramebuffer() override {
+    context_provider()->ContextGL()->BindFramebuffer(GL_FRAMEBUFFER, 0);
+  }
+
   cc::OverlayCandidateValidator* GetOverlayCandidateValidator() const override {
     return overlay_candidate_validator_.get();
   }
 
+  bool IsDisplayedAsOverlayPlane() const override { return false; }
+  unsigned GetOverlayTextureId() const override { return 0; }
+  bool SurfaceIsSuspendForRecycle() const override { return false; }
+  bool HasExternalStencilTest() const override { return false; }
+  void ApplyExternalStencil() override {}
+
   uint32_t GetFramebufferCopyTextureFormat() override {
     auto* gl = static_cast<ContextProviderCommandBuffer*>(context_provider());
     return gl->GetCopyTextureInternalFormat();
@@ -279,7 +295,7 @@ class AndroidOutputSurface : public cc::OutputSurface {
       gfx::SwapResult result,
       const gpu::GpuProcessHostedCALayerTreeParamsMac* params_mac) {
     RenderWidgetHostImpl::CompositorFrameDrawn(latency_info);
-    OutputSurface::OnSwapBuffersComplete();
+    client_->DidSwapBuffersComplete();
   }
 
  private: