Don't spam the GPU process with memory usage stats

cc/single_thread_proxy.cc

Index: cc/single_thread_proxy.cc
diff --git a/cc/single_thread_proxy.cc b/cc/single_thread_proxy.cc
index d0bea46a299c90c78f8213817990544052029681..0ff1ca1f1d0324b07be0a9e22072bfd1d01dd731 100644
--- a/cc/single_thread_proxy.cc
+++ b/cc/single_thread_proxy.cc
@@ -301,12 +301,10 @@ void SingleThreadProxy::sendManagedMemoryStats()
     DCHECK(Proxy::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());