Removed "compositor" child window that was created by the GPU process.

ui/gfx/gl/gl_context.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "ui/gfx/gl/gl_context.h"
 #include "ui/gfx/gl/gl_bindings.h"
 #include "ui/gfx/gl/gl_implementation.h"
 #include "ui/gfx/gl/gl_switches.h"
 
 namespace gfx {
 
+void GLContext::ReleaseCurrent() {
+  // TODO(apatrick): Implement this in GLContext derivatives.
+}
+
+GLSurface* GLContext::GetSurface() {
+  // TODO(apatrick): Remove this when surfaces are split from contexts.
+  return NULL;
+}
+
 unsigned int GLContext::GetBackingFrameBufferObject() {
   return 0;
 }
 
 std::string GLContext::GetExtensions() {
   DCHECK(IsCurrent());
   const char* ext = reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS));
   return std::string(ext ? ext : "");
 }
 
@@ skipping 40 matching lines @@
       return false;
     case kGLImplementationMockGL:
       return false;
     default:
       NOTREACHED();
       return true;
   }
 }
 
 }  // namespace gfx