GpuMemoryManager suggests values for renderer Contents Texture Managers' preferred memory limit.

content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc

Index: content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
diff --git a/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc b/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
index 6fcce8a4014f5d56b32aeff0aa7a06136ec7d11c..5868cb919c08839bf5fded5741e84aa7d14f4a4e 100644
--- a/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
+++ b/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
@@ -264,10 +264,6 @@ bool WebGraphicsContext3DCommandBufferImpl::MaybeInitializeGL(
     g_all_shared_contexts.Pointer()->insert(this);
   }
 
-  command_buffer_->SetMemoryAllocationChangedCallback(base::Bind(
-      &WebGraphicsContext3DCommandBufferImpl::OnMemoryAllocationChanged,
-      weak_ptr_factory_.GetWeakPtr()));
-
   visible_ = true;
   initialized_ = true;
   return true;
@@ -680,6 +676,17 @@ void WebGraphicsContext3DCommandBufferImpl::
     setMemoryAllocationChangedCallbackCHROMIUM(
         WebGraphicsMemoryAllocationChangedCallbackCHROMIUM* callback) {
   memory_allocation_changed_callback_ = callback;
+
+  if (!command_buffer_)
+    return;
+
+  if (callback)
+    command_buffer_->SetMemoryAllocationChangedCallback(base::Bind(
+        &WebGraphicsContext3DCommandBufferImpl::OnMemoryAllocationChanged,
+        weak_ptr_factory_.GetWeakPtr()));
+  else
+    command_buffer_->SetMemoryAllocationChangedCallback(
+        base::Callback<void(const GpuMemoryAllocationForRenderer&)>());
 }