cc: Make most of cc::OutputSurface abstract.

cc/output/overlay_unittest.cc

 // Copyright 2014 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 <stddef.h>
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "cc/base/region.h"
@@ skipping 138 matching lines @@
 class OverlayOutputSurface : public OutputSurface {
  public:
   explicit OverlayOutputSurface(
       scoped_refptr<TestContextProvider> context_provider)
       : OutputSurface(std::move(context_provider)) {
     surface_size_ = kDisplaySize;
     device_scale_factor_ = 1;
     is_displayed_as_overlay_plane_ = true;
   }
 
-  void SetScaleFactor(float scale_factor) {
-    device_scale_factor_ = scale_factor;
-  }
-
-  // OutputSurface implementation
+  // OutputSurface implementation.
+  void EnsureBackbuffer() override {}
+  void DiscardBackbuffer() override {}
   void BindFramebuffer() override {
-    OutputSurface::BindFramebuffer();
     bind_framebuffer_count_ += 1;
   }
   uint32_t GetFramebufferCopyTextureFormat() override {
     // TestContextProvider has no real framebuffer, just use RGB.
     return GL_RGB;
   }
   void SwapBuffers(CompositorFrame frame) override {
   }
-  void OnSwapBuffersComplete() override { client_->DidSwapBuffersComplete(); }
-
-  void SetOverlayCandidateValidator(OverlayCandidateValidator* validator) {
-    overlay_candidate_validator_.reset(validator);
-  }
-
+  bool HasExternalStencilTest() const override { return false; }
+  void ApplyExternalStencil() override {}
   OverlayCandidateValidator* GetOverlayCandidateValidator() const override {
     return overlay_candidate_validator_.get();
   }
-
   bool IsDisplayedAsOverlayPlane() const override {
     return is_displayed_as_overlay_plane_;
   }
   unsigned GetOverlayTextureId() const override { return 10000; }
   void set_is_displayed_as_overlay_plane(bool value) {
     is_displayed_as_overlay_plane_ = value;
   }
+  bool SurfaceIsSuspendForRecycle() const override { return false; }
+
+  void OnSwapBuffersComplete() { client_->DidSwapBuffersComplete(); }
+
+  void SetScaleFactor(float scale_factor) {
+    device_scale_factor_ = scale_factor;
+  }
+
+  void SetOverlayCandidateValidator(OverlayCandidateValidator* validator) {
+    overlay_candidate_validator_.reset(validator);
+  }
+
   unsigned bind_framebuffer_count() const { return bind_framebuffer_count_; }
 
  private:
   std::unique_ptr<OverlayCandidateValidator> overlay_candidate_validator_;
   bool is_displayed_as_overlay_plane_;
   unsigned bind_framebuffer_count_ = 0;
 };
 
 std::unique_ptr<RenderPass> CreateRenderPass() {
   RenderPassId id(1, 0);
@@ skipping 1694 matching lines @@
                  gfx::Size(), filters_, gfx::Vector2dF(1, 1), gfx::PointF(),
                  background_filters_);
   }
 
   ProcessForOverlays();
   EXPECT_EQ(0U, ca_layer_list_.size());
 }
 
 }  // namespace
 }  // namespace cc