Don't spam the GPU process with memory usage stats

cc/thread_proxy.cc

Index: cc/thread_proxy.cc
diff --git a/cc/thread_proxy.cc b/cc/thread_proxy.cc
index f2a62149e36d1ac7fa8d2840312678c0d0c03070..cd0baa3b6aa6dbc3d892f62a2f039722001599bb 100644
--- a/cc/thread_proxy.cc
+++ b/cc/thread_proxy.cc
@@ -386,12 +386,10 @@ void ThreadProxy::sendManagedMemoryStats()
     DCHECK(isImplThread());
     if (!m_layerTreeHostImpl.get())
         return;
-    if (!m_layerTreeHostImpl->renderer())
-        return;
     if (!m_layerTreeHost->contentsTextureManager())
         return;
 
-    m_layerTreeHostImpl->renderer()->sendManagedMemoryStats(
+    m_layerTreeHostImpl->sendManagedMemoryStats(
         m_layerTreeHost->contentsTextureManager()->memoryVisibleBytes(),
         m_layerTreeHost->contentsTextureManager()->memoryVisibleAndNearbyBytes(),
         m_layerTreeHost->contentsTextureManager()->memoryUseBytes());