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 1860 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 4758 matching lines @@
                                          external_viewport,
                                          external_clip,
                                          valid_for_tile_management);
   DrawFrame();
   EXPECT_TRANSFORMATION_MATRIX_EQ(
       external_transform, layer->draw_properties().target_space_transform);
 }
 
 }  // namespace
 }  // namespace cc