Implement OnMemoryStateChange for Various CC Classes

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 5e6e426871cf63229841e7e75d4b94f731a39033..da33b11a96f4f44a02b7813c268972e78ff5b70b 100644
--- a/cc/resources/resource_pool.cc
+++ b/cc/resources/resource_pool.cc
@@ -469,8 +469,8 @@ void ResourcePool::OnMemoryStateChange(base::MemoryState state) {
       // save memory usage.
       break;
     case base::MemoryState::SUSPENDED:
-      // TODO(tasak): free this component's caches as much as possible before
-      // suspending renderer.
+      // Release all resources, regardless of how recently they were used.
+      EvictResourcesNotUsedSince(base::TimeTicks() + base::TimeDelta::Max());
       break;
     case base::MemoryState::UNKNOWN:
       // NOT_REACHED.