cc: Implement overdraw feedback debugging feature.

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 <vector>
 
 #include "base/memory/ptr_util.h"
@@ skipping 144 matching lines @@
   // OutputSurface implementation.
   void BindToClient(OutputSurfaceClient* client) override {}
   void EnsureBackbuffer() override {}
   void DiscardBackbuffer() override {}
   void BindFramebuffer() override {
     bind_framebuffer_count_ += 1;
   }
   void Reshape(const gfx::Size& size,
                float device_scale_factor,
                const gfx::ColorSpace& color_space,
-               bool has_alpha) override {}
+               bool has_alpha,
+               bool use_stencil) override {}
   void SwapBuffers(OutputSurfaceFrame frame) override {}
   uint32_t GetFramebufferCopyTextureFormat() override {
     // TestContextProvider has no real framebuffer, just use RGB.
     return GL_RGB;
   }
   bool HasExternalStencilTest() const override { return false; }
   void ApplyExternalStencil() override {}
   OverlayCandidateValidator* GetOverlayCandidateValidator() const override {
     return overlay_candidate_validator_.get();
   }
@@ skipping 1810 matching lines @@
                  kOverlayRect, render_pass_id_, 2, gfx::Vector2dF(),
                  gfx::Size(), gfx::Vector2dF(1, 1), gfx::PointF());
   }
 
   ProcessForOverlays();
   EXPECT_EQ(0U, ca_layer_list_.size());
 }
 
 }  // namespace
 }  // namespace cc