cc: Don't clip tile priority visible rect to content bounds.

cc/layers/picture_layer_impl_unittest.cc

Index: cc/layers/picture_layer_impl_unittest.cc
diff --git a/cc/layers/picture_layer_impl_unittest.cc b/cc/layers/picture_layer_impl_unittest.cc
index 2b9457b019fe60f6862711d97893cd87f7bda4c0..b038bccfd2e423f04c8e16b1ff0ba35b059b4fe9 100644
--- a/cc/layers/picture_layer_impl_unittest.cc
+++ b/cc/layers/picture_layer_impl_unittest.cc
@@ -405,10 +405,6 @@ TEST_F(PictureLayerImplTest, ExternalViewportRectForPrioritizingTiles) {
   EXPECT_EQ(active_layer_->viewport_rect_for_tile_priority(),
             viewport_rect_for_tile_priority_in_view_space);
 
-  // Interset viewport_rect_for_tile_priority_in_view_space with the layer

[danakj, 2014/09/18 23:19:36]

It would be really easy to add back that intersect and just say "oh this test
must be wrong". Can you add a comment explaining here why the rect should be
outside the layer bounds?

[vmpstr, 2014/09/18 23:58:46]

Done.

-  // bounds and the result should be used in PictureLayerTiling.
-  viewport_rect_for_tile_priority_in_view_space.Intersect(
-      gfx::Rect(layer_bounds));
   tilings = active_layer_->tilings();
   for (size_t i = 0; i < tilings->num_tilings(); i++) {
     PictureLayerTiling* tiling = tilings->tiling_at(i);