cc: Fullscreen overlay removes all the other quads/planes.

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 405 matching lines @@
                              pass->shared_quad_state_list.back(), pass.get());
 
   // Check for potential candidates.
   OverlayCandidateList candidate_list;
   overlay_processor_->ProcessForOverlays(resource_provider_.get(), pass.get(),
                                          &candidate_list, nullptr,
                                          &damage_rect_);
   ASSERT_EQ(1U, candidate_list.size());
 
   RenderPass* main_pass = pass.get();
-  // Check that the quad is gone.
-  EXPECT_EQ(1U, main_pass->quad_list.size());
+  // Check that all the quads are gone.
+  EXPECT_EQ(0U, main_pass->quad_list.size());
+  // Check that we have only one overlay.
+  EXPECT_EQ(1U, candidate_list.size());
   // Check that the right resource id got extracted.
-  EXPECT_EQ(original_resource_id, candidate_list.back().resource_id);
+  EXPECT_EQ(original_resource_id, candidate_list.front().resource_id);
 }
 
 TEST_F(FullscreenOverlayTest, ResourceSizeInPixelsFail) {
   std::unique_ptr<RenderPass> pass = CreateRenderPass();
   TextureDrawQuad* original_quad = CreateFullscreenCandidateQuad(
       resource_provider_.get(), pass->shared_quad_state_list.back(),
       pass.get());
   original_quad->set_resource_size_in_pixels(gfx::Size(64, 64));
 
   // Check for potential candidates.
@@ skipping 1430 matching lines @@
   filters_.Append(FilterOperation::CreateZoomFilter(0.9f, 1));
   quad_->SetNew(pass_->shared_quad_state_list.back(), kOverlayRect,
                 kOverlayRect, render_pass_id_, 0, gfx::Vector2dF(), gfx::Size(),
                 filters_, gfx::Vector2dF(1, 1), background_filters_);
   ProcessForOverlays();
   EXPECT_EQ(0U, ca_layer_list_.size());
 }
 
 }  // namespace
 }  // namespace cc