cc: Do solid color analysis before scheduling tiles.

cc/tiles/tile_manager_unittest.cc

Index: cc/tiles/tile_manager_unittest.cc
diff --git a/cc/tiles/tile_manager_unittest.cc b/cc/tiles/tile_manager_unittest.cc
index 2c69999b235a91880aff8e07dc63f6a6682415ce..40fe261460903a4953de212a73588a958d9c54d4 100644
--- a/cc/tiles/tile_manager_unittest.cc
+++ b/cc/tiles/tile_manager_unittest.cc
@@ -1449,6 +1449,48 @@ TEST_F(TileManagerTilePriorityQueueTest, RasterQueueAllUsesCorrectTileBounds) {
   }
 }
 
+TEST_F(TileManagerTilePriorityQueueTest, NoRasterTasksforSolidColorTiles) {
+  gfx::Size size(10, 10);
+  const gfx::Size layer_bounds(10, 10);
+
+  scoped_ptr<FakeDisplayListRecordingSource> recording_source =
+      FakeDisplayListRecordingSource::CreateFilledRecordingSource(layer_bounds);
+
+  SkPaint solid_paint;
+  SkColor solid_color = SkColorSetARGB(255, 12, 23, 34);
+  solid_paint.setColor(solid_color);
+  recording_source->add_draw_rect_with_paint(gfx::Rect(layer_bounds),
+                                             solid_paint);
+  recording_source->Rerecord();
+
+  scoped_refptr<DisplayListRasterSource> raster =

[vmpstr, 2016/01/06 19:35:03]

nit: raster_source

[sohanjg, 2016/01/07 10:13:00]

Done.

+      DisplayListRasterSource::CreateFromDisplayListRecordingSource(
+          recording_source.get(), false);
+
+  FakePictureLayerTilingClient tiling_client;
+  tiling_client.SetTileSize(size);
+
+  scoped_ptr<PictureLayerImpl> layer =

[vmpstr, 2016/01/06 19:35:03]

nit: layer_impl

[sohanjg, 2016/01/07 10:13:00]

Done.

+      PictureLayerImpl::Create(host_impl_.active_tree(), 1, false, nullptr);
+  PictureLayerTilingSet* tiling_set = layer->picture_layer_tiling_set();
+
+  PictureLayerTiling* tiling = tiling_set->AddTiling(1.0f, raster);
+  tiling->set_resolution(HIGH_RESOLUTION);
+  tiling->CreateAllTilesForTesting();
+  tiling->SetTilePriorityRectsForTesting(gfx::Rect(size),   // Visible rect.
+                                         gfx::Rect(size),   // Skewport rect.
+                                         gfx::Rect(size),   // Soon rect.
+                                         gfx::Rect(size));  // Eventually rect.
+
+  host_impl_.tile_manager()->PrepareTiles(host_impl_.global_tile_state());
+
+  std::vector<Tile*> tiles = tiling->AllTilesForTesting();
+  for (size_t tile_idx = 0; tile_idx < tiles.size(); ++tile_idx) {
+    Tile* tile = tiles[tile_idx];
+    EXPECT_FALSE(tile->HasRasterTask());

[vmpstr, 2016/01/06 19:35:03]

can you also

EXPECT_EQ(TileDrawInfo::SOLID_COLOR_MODE, tile->draw_info().mode());

and 

EXPECT_EQ(solid_color, tile->draw_info().solid_color());

[sohanjg, 2016/01/07 10:13:00]

Done.

+  }
+}
+
 // TODO(vmpstr): Merge TileManagerTest and TileManagerTilePriorityQueueTest.
 class TileManagerTest : public testing::Test {
  public: