Make cc::SoftwareImageDecodeController, cc::ResourcePool, and cc::StagingBufferPoo…

cc/resources/resource_pool.cc

Index: cc/resources/resource_pool.cc
diff --git a/cc/resources/resource_pool.cc b/cc/resources/resource_pool.cc
index f4523d448f981d568bd229626fcb0fb1f284b3cd..193cc8c63b9568e0b75779261219ea270147a891 100644
--- a/cc/resources/resource_pool.cc
+++ b/cc/resources/resource_pool.cc
@@ -453,4 +453,12 @@ bool ResourcePool::OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
   return true;
 }
 
+void ResourcePool::OnMemoryStateChange(
+    memory_coordinator::mojom::MemoryState state) {
+  if (state == memory_coordinator::mojom::MemoryState::SUSPENDED) {
+    while (!unused_resources_.empty())
+      DeleteResource(PopBack(&unused_resources_));

[ericrk, 2016/08/31 17:50:32]

This doesn't free "busy" resources, which can safely be released. Prefer:
EvictResourcesNotUsedSince(base::TimeTicks() + base::TimeDelta::Max());

+  }
+}
+
 }  // namespace cc