cc: Keep track of busy resources in ResourcePool

cc/resources/tile_manager.cc

Index: cc/resources/tile_manager.cc
diff --git a/cc/resources/tile_manager.cc b/cc/resources/tile_manager.cc
index df69f700be727934fb2d017a5a81f72d0d4744e9..5461617d5471138060f8724cf7ce42ce0e3f76d4 100644
--- a/cc/resources/tile_manager.cc
+++ b/cc/resources/tile_manager.cc
@@ -595,6 +595,8 @@ void TileManager::AssignGpuMemoryToTiles(
     TileVector* tiles_that_need_to_be_rasterized) {
   TRACE_EVENT0("cc", "TileManager::AssignGpuMemoryToTiles");
 
+  resource_pool_->CheckConsumedResources();

[piman, 2013/10/30 19:35:30]

note, if this becomes to expensive to do all the time, the resource return path
goes through the LTHI which could forward a signal "we may have returned some
resources" to here.

[reveman, 2013/10/30 21:10:28]

I think this is good enough for now but a comment that points out what piman@
mentioned would be nice.

+
   // Now give memory out to the tiles until we're out, and build
   // the needs-to-be-rasterized queue.
   all_tiles_that_need_to_be_rasterized_have_memory_ = true;