Revert 272635 "cc: Examine layers to determine if we're ready to..."

Caused layout test failures and out-of-memory errors on several Mac
bots on the Blink waterfall. See Issue 375206.

BUG=375206

> cc: Examine layers to determine if we're ready to activate.
> 
> This introduces a new mechanism for determining when
> we're ready to activate the pending tree. The tile
> priority is still used to determine when it's worth
> waking up the compositor thread and evaluating if
> we can activate. However, the actual check that
> determines if we're ready to activate doesn't rely
> on the state of scheduled raster tasks but is a
> synchronous call on each layer.
> 
> The result is a pending tree activation mechanism that
> is much easier to debug and validate for correctness,
> while still providing the performance benefits of the
> old mechanism by taking the "required to activate" field
> of the tile priority into account when scheduling tasks.
>  
> BUG=375206
> TEST=cc_unittests --gtest_filter=PictureLayerImplTest.AllTilesRequiredForActivationAreReadyToDraw
> 
> Review URL: https://codereview.chromium.org/287643004

TBR=reveman@chromium.org

Review URL: https://codereview.chromium.org/301493002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272660 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 0 insertions, 56 deletions

diff --git a/cc/layers/picture_layer_impl_unittest.cc b/cc/layers/picture_layer_impl_unittest.cc
index 64454ae..d919298 100644
--- a/cc/layers/picture_layer_impl_unittest.cc
+++ b/cc/layers/picture_layer_impl_unittest.cc
@@ -2391,61 +2391,5 @@ TEST_F(PictureLayerImplTest, RasterScaleChangeWithoutAnimation) {
   EXPECT_BOTH_EQ(HighResTiling()->contents_scale(), 1.f);
 }
 
-TEST_F(PictureLayerImplTest, LowResReadyToDrawNotEnoughToActivate) {
-  gfx::Size tile_size(100, 100);
-  gfx::Size layer_bounds(1000, 1000);
-
-  SetupDefaultTreesWithFixedTileSize(layer_bounds, tile_size);
-
-  // Make sure some tiles are not shared.
-  pending_layer_->set_invalidation(gfx::Rect(gfx::Point(50, 50), tile_size));
-
-  CreateHighLowResAndSetAllTilesVisible();
-  active_layer_->SetAllTilesReady();
-  pending_layer_->MarkVisibleResourcesAsRequired();
-
-  // All pending layer tiles required are not ready.
-  EXPECT_FALSE(pending_layer_->AllTilesRequiredForActivationAreReadyToDraw());
-
-  // Initialize all low-res tiles.
-  pending_layer_->SetAllTilesReadyInTiling(pending_layer_->LowResTiling());
-
-  // Low-res tiles should not be enough.
-  EXPECT_FALSE(pending_layer_->AllTilesRequiredForActivationAreReadyToDraw());
-
-  // Initialize remaining tiles.
-  pending_layer_->SetAllTilesReady();
-
-  EXPECT_TRUE(pending_layer_->AllTilesRequiredForActivationAreReadyToDraw());
-}
-
-TEST_F(PictureLayerImplTest, HighResReadyToDrawNotEnoughToActivate) {
-  gfx::Size tile_size(100, 100);
-  gfx::Size layer_bounds(1000, 1000);
-
-  SetupDefaultTreesWithFixedTileSize(layer_bounds, tile_size);
-
-  // Make sure some tiles are not shared.
-  pending_layer_->set_invalidation(gfx::Rect(gfx::Point(50, 50), tile_size));
-
-  CreateHighLowResAndSetAllTilesVisible();
-  active_layer_->SetAllTilesReady();
-  pending_layer_->MarkVisibleResourcesAsRequired();
-
-  // All pending layer tiles required are not ready.
-  EXPECT_FALSE(pending_layer_->AllTilesRequiredForActivationAreReadyToDraw());
-
-  // Initialize all high-res tiles.
-  pending_layer_->SetAllTilesReadyInTiling(pending_layer_->HighResTiling());
-
-  // High-res tiles should not be enough.
-  EXPECT_FALSE(pending_layer_->AllTilesRequiredForActivationAreReadyToDraw());
-
-  // Initialize remaining tiles.
-  pending_layer_->SetAllTilesReady();
-
-  EXPECT_TRUE(pending_layer_->AllTilesRequiredForActivationAreReadyToDraw());
-}
-
 }  // namespace
 }  // namespace cc