Move allocate instance id to chrome/.

chrome/browser/extensions/api/guestview/guestview_api.h

+// Copyright 2014 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 CHROME_BROWSER_EXTENSIONS_API_GUESTVIEW_GUESTVIEW_API_H_
+#define CHROME_BROWSER_EXTENSIONS_API_GUESTVIEW_GUESTVIEW_API_H_
+
+#include "extensions/browser/extension_function.h"
+
+namespace extensions {
+
+class GuestviewAllocateInstanceIdFunction : public AsyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("guestview.allocateInstanceId",
+                             GUESTVIEW_ALLOCATEINSTANCEID);
+  GuestviewAllocateInstanceIdFunction();
+ protected:
+  virtual ~GuestviewAllocateInstanceIdFunction() {}
+  virtual bool RunAsync() OVERRIDE FINAL;
+ private:
+  DISALLOW_COPY_AND_ASSIGN(GuestviewAllocateInstanceIdFunction);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_GUESTVIEW_GUESTVIEW_API_H_