cc: Make most of cc::OutputSurface abstract.

cc/test/fake_output_surface.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/test/fake_output_surface.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "cc/output/output_surface_client.h"
 #include "cc/resources/returned_resource.h"
@@ skipping 37 matching lines @@
       resources_held_by_parent_.insert(resources_held_by_parent_.end(),
                                        frame_data->resource_list.begin(),
                                        frame_data->resource_list.end());
     }
   }
 
   PostSwapBuffersComplete();
 }
 
 void FakeOutputSurface::BindFramebuffer() {
-  if (framebuffer_) {
-    context_provider_->ContextGL()->BindFramebuffer(GL_FRAMEBUFFER,
-                                                    framebuffer_);
-  } else {
-    OutputSurface::BindFramebuffer();
-  }
+  context_provider_->ContextGL()->BindFramebuffer(GL_FRAMEBUFFER, framebuffer_);
 }
 
 uint32_t FakeOutputSurface::GetFramebufferCopyTextureFormat() {
   if (framebuffer_)
     return framebuffer_format_;
   else
     return GL_RGB;
 }
 
 bool FakeOutputSurface::BindToClient(OutputSurfaceClient* client) {
   if (OutputSurface::BindToClient(client)) {
     client_ = client;
     return true;
   } else {
     return false;
   }
 }
 
-void FakeOutputSurface::DetachFromClient() {
-  ReturnResourcesHeldByParent();
-  OutputSurface::DetachFromClient();
-}
-
 bool FakeOutputSurface::HasExternalStencilTest() const {
   return has_external_stencil_test_;
 }
 
 bool FakeOutputSurface::SurfaceIsSuspendForRecycle() const {
   return suspended_for_recycle_;
 }
 
 OverlayCandidateValidator* FakeOutputSurface::GetOverlayCandidateValidator()
     const {
   return overlay_candidate_validator_;
 }
 
+bool FakeOutputSurface::IsDisplayedAsOverlayPlane() const {
+  return false;
+}
+
+unsigned FakeOutputSurface::GetOverlayTextureId() const {
+  return 0;
+}
+
 void FakeOutputSurface::ReturnResourcesHeldByParent() {
   // Check |delegated_frame_data| because we shouldn't reclaim resources
   // for the Display which does not swap delegated frames.
   if (last_sent_frame_ && last_sent_frame_->delegated_frame_data) {
     // Return the last frame's resources immediately.
     ReturnedResourceArray resources;
     for (const auto& resource : resources_held_by_parent_)
       resources.push_back(resource.ToReturnedResource());
     resources_held_by_parent_.clear();
     client_->ReclaimResources(resources);
   }
 }
 
 }  // namespace cc