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 bff066bfa221171a3b29da11c1d6cac1796c4d6e..9dd76895a73a2b8cbc0ebd52f0bc7ef11a9ebe9e 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());