Add a stat to the smoothness benchmark for avg number of missing tiles.

cc/tiled_layer_impl_unittest.cc

 // Copyright 2012 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/tiled_layer_impl.h"
 
 #include "cc/append_quads_data.h"
 #include "cc/layer_tiling_data.h"
 #include "cc/single_thread_proxy.h"
 #include "cc/test/layer_test_common.h"
@@ skipping 92 matching lines @@
     const gfx::Size layerSize(tileSize.width() * numTilesX, tileSize.height() * numTilesY);
 
     scoped_ptr<TiledLayerImpl> layer = createLayer(tileSize, layerSize, LayerTilingData::NoBorderTexels);
 
     // No checkerboarding
     {
         MockQuadCuller quadCuller;
         AppendQuadsData data;
         layer->appendQuads(quadCuller, data);
         EXPECT_EQ(quadCuller.quadList().size(), 4u);
-        EXPECT_FALSE(data.hadMissingTiles);
+        EXPECT_EQ(0u, data.numMissingTiles);
 
         for (size_t i = 0; i < quadCuller.quadList().size(); ++i)
             EXPECT_EQ(quadCuller.quadList()[i]->material, DrawQuad::TILED_CONTENT);
     }
 
     for (int i = 0; i < numTilesX; ++i)
         for (int j = 0; j < numTilesY; ++j)
             layer->pushTileProperties(i, j, 0, gfx::Rect(), false);
 
     // All checkerboarding
     {
         MockQuadCuller quadCuller;
         AppendQuadsData data;
         layer->appendQuads(quadCuller, data);
-        EXPECT_TRUE(data.hadMissingTiles);
+        EXPECT_LT(0u, data.numMissingTiles);
         EXPECT_EQ(quadCuller.quadList().size(), 4u);
         for (size_t i = 0; i < quadCuller.quadList().size(); ++i)
             EXPECT_NE(quadCuller.quadList()[i]->material, DrawQuad::TILED_CONTENT);
     }
 }
 
 static void getQuads(QuadList& quads, SharedQuadStateList& sharedStates, gfx::Size tileSize, const gfx::Size& layerSize, LayerTilingData::BorderTexelOption borderTexelOption, const gfx::Rect& visibleContentRect)
 {
     scoped_ptr<TiledLayerImpl> layer = createLayer(tileSize, layerSize, borderTexelOption);
     layer->drawProperties().visible_content_rect = visibleContentRect;
@@ skipping 64 matching lines @@
 
         EXPECT_NE(0u, quad->resource_id) << quadString << i;
         EXPECT_EQ(gfx::RectF(gfx::PointF(), tileSize), quad->tex_coord_rect) << quadString << i;
         EXPECT_EQ(tileSize, quad->texture_size) << quadString << i;
         EXPECT_EQ(gfx::Rect(0, 0, 1, 1), quad->opaque_rect) << quadString << i;
     }
 }
 
 }  // namespace
 }  // namespace cc