Histogram to track missing and incomplete tiles

cc/trees/layer_tree_host_impl_unittest.cc

 // Copyright 2011 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/trees/layer_tree_host_impl.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 1878 matching lines @@
                                          had_incomplete_tile,
                                          animating,
                                          resource_provider));
   }
 
   virtual void AppendQuads(RenderPass* render_pass,
                            const OcclusionTracker<LayerImpl>& occlusion_tracker,
                            AppendQuadsData* append_quads_data) OVERRIDE {
     LayerImpl::AppendQuads(render_pass, occlusion_tracker, append_quads_data);
     if (had_incomplete_tile_)
-      append_quads_data->had_incomplete_tile = true;
+      append_quads_data->num_incomplete_tiles++;
     if (tile_missing_)
       append_quads_data->num_missing_tiles++;
   }
 
  private:
   MissingTextureAnimatingLayer(LayerTreeImpl* tree_impl,
                                int id,
                                bool tile_missing,
                                bool had_incomplete_tile,
                                bool animating,
@@ skipping 185 matching lines @@
                                            host_impl_->resource_provider()));
   host_impl_->active_tree()->SetRequiresHighResToDraw();
   LayerTreeHostImpl::FrameData frame;
   EXPECT_EQ(DRAW_ABORTED_MISSING_HIGH_RES_CONTENT,
             host_impl_->PrepareToDraw(&frame));
   host_impl_->DrawLayers(&frame);
   host_impl_->DidDrawAllLayers(frame);
 }
 
 TEST_F(LayerTreeHostImplTest,
-       PrepareToDrawSucceedsWhenHighResRequiredAndMissingTile) {
+       PrepareToDrawFailsWhenHighResRequiredAndMissingTile) {
   host_impl_->active_tree()->SetRootLayer(
       DidDrawCheckLayer::Create(host_impl_->active_tree(), 7));
   DidDrawCheckLayer* root =
       static_cast<DidDrawCheckLayer*>(host_impl_->active_tree()->root_layer());
   bool tile_missing = true;
   bool had_incomplete_tile = false;
   bool is_animating = false;
   root->AddChild(
       MissingTextureAnimatingLayer::Create(host_impl_->active_tree(),
                                            8,
                                            tile_missing,
                                            had_incomplete_tile,
                                            is_animating,
                                            host_impl_->resource_provider()));
   host_impl_->active_tree()->SetRequiresHighResToDraw();
   LayerTreeHostImpl::FrameData frame;
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
+  EXPECT_EQ(DRAW_ABORTED_MISSING_HIGH_RES_CONTENT,
+            host_impl_->PrepareToDraw(&frame));
   host_impl_->DrawLayers(&frame);
   host_impl_->DidDrawAllLayers(frame);
 }
 
 TEST_F(LayerTreeHostImplTest, ScrollRootIgnored) {
   scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_->active_tree(), 1);
   root->SetScrollClipLayer(Layer::INVALID_ID);
   host_impl_->active_tree()->SetRootLayer(root.Pass());
   DrawFrame();
 
@@ skipping 4628 matching lines @@
 
   host_impl_->Animate(start_time + base::TimeDelta::FromMilliseconds(200));
   host_impl_->UpdateAnimationState(true);
 
   EXPECT_EQ(gfx::Vector2dF(0, 50), scrolling_layer->TotalScrollOffset());
   EXPECT_EQ(NULL, host_impl_->CurrentlyScrollingLayer());
 }
 
 }  // namespace
 }  // namespace cc