cc: Free gpu resources when we are invisible or TM is oom.

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 00ae766155f380cb6f9ec597dd5b8575d7791b36..59fceff09cafcfc00cb5ef941f8d582c816e6f38 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -1176,6 +1176,10 @@ void LayerTreeHostImpl::UpdateTileManagerMemoryPolicy(
           gpu::MemoryAllocation::CUTOFF_ALLOW_NOTHING);
   global_tile_state_.num_resources_limit = policy.num_resources_limit;
 
+  if (use_gpu_rasterization_ && rasterizer_)
+    rasterizer_->SetMemoryLimits(visible_,
+                                 global_tile_state_.hard_memory_limit_in_bytes);
+
   // TODO(reveman): We should avoid keeping around unused resources if
   // possible. crbug.com/224475
   // Unused limit is calculated from soft-limit, as hard-limit may