Lazily instantiate Geolocation permission manager maps.

public/web/WebGeolocationPermissionRequestManager.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
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  * modification, are permitted provided that the following conditions
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  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 #ifndef WebGeolocationPermissionRequestManager_h
 #define WebGeolocationPermissionRequestManager_h
 
 #include "../platform/WebNonCopyable.h"
-#include "../platform/WebPrivateOwnPtr.h"
+#include "../platform/WebPrivatePtr.h"
 
 namespace blink {
 
 class WebGeolocationPermissionRequest;
 class WebGeolocationPermissionRequestManagerPrivate;
 
 // This class is used to map between integer identifiers and WebGeolocationPermissionRequest
 // instances. The intended usage is that on WebGeolocationClient::requestPermission(),
 // the implementer can call add() to associate an id with the WebGeolocationPermissionRequest object.
 // Once the permission request has been decided, the second remove() method can be used to
 // find the request. On WebGeolocationClient::cancelPermissionRequest, the first remove() method will
 // remove the association with the id.
 class WebGeolocationPermissionRequestManager : public WebNonCopyable {
 public:
-    WebGeolocationPermissionRequestManager() { init(); }
+    WebGeolocationPermissionRequestManager() { }
     ~WebGeolocationPermissionRequestManager() { reset(); }
 
     BLINK_EXPORT int add(const WebGeolocationPermissionRequest&);
     BLINK_EXPORT bool remove(const WebGeolocationPermissionRequest&, int&);
     BLINK_EXPORT bool remove(int, WebGeolocationPermissionRequest&);
 
 private:
-    BLINK_EXPORT void init();
     BLINK_EXPORT void reset();
 
-    WebPrivateOwnPtr<WebGeolocationPermissionRequestManagerPrivate> m_private;
+    WebGeolocationPermissionRequestManagerPrivate* ensureManager();
+
+    WebPrivatePtr<WebGeolocationPermissionRequestManagerPrivate> m_private;
 };
 
 }
 
 #endif // WebGeolocationPermissionRequestManager_h