Remove WebCompositorSupport::initialize/shutdown dependency from webkit_support::CreateLayerTreeView

webkit/support/webkit_support.h

 // Copyright (c) 2012 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.
 
 #ifndef WEBKIT_SUPPORT_WEBKIT_SUPPORT_H_
 #define WEBKIT_SUPPORT_WEBKIT_SUPPORT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 115 matching lines @@
   IN_PROCESS_COMMAND_BUFFER
 };
 // Registers which GraphicsContext3D Implementation to use.
 void SetGraphicsContext3DImplementation(GraphicsContext3DImplementation);
 GraphicsContext3DImplementation GetGraphicsContext3DImplementation();
 
 WebKit::WebGraphicsContext3D* CreateGraphicsContext3D(
     const WebKit::WebGraphicsContext3D::Attributes& attributes,
     WebKit::WebView* web_view);
 
+enum LayerTreeViewType {
+  FAKE_CONTEXT,
+  SOFTWARE_CONTEXT,
+  MESA_CONTEXT
+};
+
 class DRTLayerTreeViewClient {
  public:
   virtual ~DRTLayerTreeViewClient() { }
   virtual void Layout() = 0;
   virtual void ScheduleComposite() = 0;
 };
 
+WebKit::WebLayerTreeView* CreateLayerTreeView(
+    LayerTreeViewType type,
+    DRTLayerTreeViewClient* client,
+    WebKit::WebThread* thread);
+
+// DEPRECATED. TODO(jamesr): Remove these two after fixing WebKit-side callers.
 WebKit::WebLayerTreeView* CreateLayerTreeViewSoftware(
     DRTLayerTreeViewClient* client);
 WebKit::WebLayerTreeView* CreateLayerTreeView3d(
     DRTLayerTreeViewClient* client);
 
 // ------- URL load mocking.
 // Registers the file at |file_path| to be served when |url| is requested.
 // |response| is the response provided with the contents.
 void RegisterMockedURL(const WebKit::WebURL& url,
                        const WebKit::WebURLResponse& response,
@@ skipping 149 matching lines @@
 
 void EnableWebCoreLogChannels(const std::string& channels);
 
 // - Gamepad
 
 void SetGamepadData(const WebKit::WebGamepads& pads);
 
 }  // namespace webkit_support
 
 #endif  // WEBKIT_SUPPORT_WEBKIT_SUPPORT_H_