Move gpu memory calculations to Compositor.

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 fa3ba0e599df1d93f2bbd0fdf3c7ce6f33c2a9cd..e167d64909f8e640eac259cc9896d133699e6e39 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -129,16 +129,6 @@ void DidVisibilityChange(LayerTreeHostImpl* id, bool visible) {
   TRACE_EVENT_ASYNC_END0("cc", "LayerTreeHostImpl::SetVisible", id);
 }
 
-size_t GetDefaultMemoryAllocationLimit() {
-  // TODO(ccameron): (http://crbug.com/137094) This 64MB default is a straggler
-  // from the old texture manager and is just to give us a default memory
-  // allocation before we get a callback from the GPU memory manager. We
-  // should probaby either:
-  // - wait for the callback before rendering anything instead
-  // - push this into the GPU memory manager somehow.
-  return 64 * 1024 * 1024;
-}
-
 }  // namespace
 
 LayerTreeHostImpl::FrameData::FrameData()
@@ -188,10 +178,7 @@ LayerTreeHostImpl::LayerTreeHostImpl(
       root_layer_scroll_offset_delegate_(NULL),
       settings_(settings),
       visible_(true),
-      cached_managed_memory_policy_(
-          GetDefaultMemoryAllocationLimit(),
-          gpu::MemoryAllocation::CUTOFF_ALLOW_EVERYTHING,
-          ManagedMemoryPolicy::kDefaultNumResourcesLimit),
+      cached_managed_memory_policy_(settings.memory_policy_),
       is_synchronous_single_threaded_(!proxy->HasImplThread() &&
                                       !settings.single_thread_proxy_scheduler),
       // Must be initialized after is_synchronous_single_threaded_ and proxy_.