Add a flag to disable partial raster in renderer

cc/tiles/picture_layer_tiling_unittest.cc

Index: cc/tiles/picture_layer_tiling_unittest.cc
diff --git a/cc/tiles/picture_layer_tiling_unittest.cc b/cc/tiles/picture_layer_tiling_unittest.cc
index ec3b87024d78931c0df77bd8fef84c3b76646fd1..6a75a6259dbbd8c540f4156926948cf13125db54 100644
--- a/cc/tiles/picture_layer_tiling_unittest.cc
+++ b/cc/tiles/picture_layer_tiling_unittest.cc
@@ -1796,5 +1796,54 @@ TEST_F(PictureLayerTilingIteratorTest, GiantRect) {
   VerifyTilesExactlyCoverRect(contents_scale, content_rect);
 }
 
+TEST_F(PictureLayerTilingIteratorTest,
+       InvalidatedIdRespectsEnabledPartialRaster) {
+  // Verifies that a resize with invalidation for newly exposed pixels will
+  // deletes tiles that intersect that invalidation.
+  gfx::Size tile_size(100, 100);
+  gfx::Size original_layer_size(10, 10);
+  client_.SetTileSize(tile_size);
+  scoped_refptr<FakeDisplayListRasterSource> raster_source =
+      FakeDisplayListRasterSource::CreateFilled(original_layer_size);
+  LayerTreeSettings settings;
+  settings.enable_partial_raster = true;
+  tiling_ = TestablePictureLayerTiling::Create(ACTIVE_TREE, 1.f, raster_source,
+                                               &client_, settings);
+  tiling_->set_resolution(HIGH_RESOLUTION);
+  SetLiveRectAndVerifyTiles(gfx::Rect(original_layer_size));
+
+  // Tiling only has one tile, since its total size is less than one.
+  EXPECT_TRUE(tiling_->TileAt(0, 0));
+
+  Region invalidation =
+      SubtractRegions(gfx::Rect(tile_size), gfx::Rect(original_layer_size));
+
+  EXPECT_TRUE(tiling_->TileAt(0, 0));
+  EXPECT_FALSE(tiling_->TileAt(0, 0)->invalidated_id());

[vmpstr, 2015/10/06 18:35:49]

can you make this EXPECT_EQ(0, ...);

[ericrk, 2015/10/07 17:59:08]

Done.

+  tiling_->Invalidate(invalidation);
+  EXPECT_TRUE(tiling_->TileAt(0, 0)->invalidated_id());

[vmpstr, 2015/10/06 18:35:49]

Can you save off the original tile id and EXPECT_EQ it?

[ericrk, 2015/10/07 17:59:08]

Done.

+}
+
+TEST_F(PictureLayerTilingIteratorTest,
+       InvalidatedIdRespectsDisabledPartialRaster) {
+  // Verifies that a resize with invalidation for newly exposed pixels will
+  // deletes tiles that intersect that invalidation.
+  gfx::Size tile_size(100, 100);
+  gfx::Size original_layer_size(10, 10);
+  InitializeActive(tile_size, 1.f, original_layer_size);
+  SetLiveRectAndVerifyTiles(gfx::Rect(original_layer_size));
+
+  // Tiling only has one tile, since its total size is less than one.
+  EXPECT_TRUE(tiling_->TileAt(0, 0));
+
+  Region invalidation =
+      SubtractRegions(gfx::Rect(tile_size), gfx::Rect(original_layer_size));
+
+  EXPECT_TRUE(tiling_->TileAt(0, 0));
+  EXPECT_FALSE(tiling_->TileAt(0, 0)->invalidated_id());

[vmpstr, 2015/10/06 18:35:49]

Same here.

[ericrk, 2015/10/07 17:59:08]

Done.

+  tiling_->Invalidate(invalidation);
+  EXPECT_FALSE(tiling_->TileAt(0, 0)->invalidated_id());
+}
+
 }  // namespace
 }  // namespace cc