Make lost context and error message callbacks on GpuControl go to client

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 708a3da8ee0a8b2c93894de7eef23006bd2fa062..8ae7b266ec9a527b10ea00e8b413dcaf49690a40 100644
--- a/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
+++ b/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
@@ -120,7 +120,9 @@ WebGraphicsContext3DCommandBufferImpl::WebGraphicsContext3DCommandBufferImpl(
 WebGraphicsContext3DCommandBufferImpl::
     ~WebGraphicsContext3DCommandBufferImpl() {
   if (real_gl_) {
-    real_gl_->SetErrorMessageCallback(NULL);
+    real_gl_->SetErrorMessageCallback(
+        base::Callback<void(const char*, int32_t)>());
+    real_gl_->SetLostContextCallback(base::Closure());
   }
 
   Destroy();
@@ -147,15 +149,16 @@ bool WebGraphicsContext3DCommandBufferImpl::MaybeInitializeGL() {
     return false;
   }
 
-  command_buffer_->SetContextLostCallback(
-      base::Bind(&WebGraphicsContext3DCommandBufferImpl::OnContextLost,
-                 weak_ptr_factory_.GetWeakPtr()));
-
-  command_buffer_->SetOnConsoleMessageCallback(
+  real_gl_->SetErrorMessageCallback(
+      // This method is in WebGraphicsContext3DImpl.
       base::Bind(&WebGraphicsContext3DCommandBufferImpl::OnErrorMessage,
-                 weak_ptr_factory_.GetWeakPtr()));
+                 // The callback is unset in the destructor.
+                 base::Unretained(this)));
+  real_gl_->SetLostContextCallback(
+      base::Bind(&WebGraphicsContext3DCommandBufferImpl::OnContextLost,
+                 // The callback is unset in the destructor.
+                 base::Unretained(this)));
 
-  real_gl_->SetErrorMessageCallback(getErrorMessageCallback());
   real_gl_->TraceBeginCHROMIUM("WebGraphicsContext3D",
                                "CommandBufferContext");