Revert of 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 3417528dbb9fe3ad43799787a5441b687ddd4fdc..56c4c905ce96573c9e3e44db3ca52e2437ff06e0 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -129,6 +129,16 @@ 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()
@@ -177,7 +187,10 @@ LayerTreeHostImpl::LayerTreeHostImpl(
       tile_priorities_dirty_(false),
       settings_(settings),
       visible_(false),
-      cached_managed_memory_policy_(settings.memory_policy_),
+      cached_managed_memory_policy_(
+          GetDefaultMemoryAllocationLimit(),
+          gpu::MemoryAllocation::CUTOFF_ALLOW_EVERYTHING,
+          ManagedMemoryPolicy::kDefaultNumResourcesLimit),
       is_synchronous_single_threaded_(!task_runner_provider->HasImplThread() &&
                                       !settings.single_thread_proxy_scheduler),
       // Must be initialized after is_synchronous_single_threaded_ and