Oilpan: simplify quota storage callbacks objects.

public/platform/WebStorageQuotaCallbacks.h

Index: public/platform/WebStorageQuotaCallbacks.h
diff --git a/public/platform/WebStorageQuotaCallbacks.h b/public/platform/WebStorageQuotaCallbacks.h
index ca8b8529a064ad9f010ca862165f413f5ff5dbbe..790a0a2a1891d6b854784ca4958b91aec9e1f1c9 100644
--- a/public/platform/WebStorageQuotaCallbacks.h
+++ b/public/platform/WebStorageQuotaCallbacks.h
@@ -35,12 +35,9 @@
 #include "WebPrivatePtr.h"
 #include "WebStorageQuotaError.h"
 
-namespace WTF { template <typename T> class PassOwnPtr; }
-
 namespace blink {
 
 class StorageQuotaCallbacks;
-class WebStorageQuotaCallbacksPrivate;
 
 class WebStorageQuotaCallbacks {
 public:
@@ -57,7 +54,7 @@ public:
     BLINK_PLATFORM_EXPORT void assign(const WebStorageQuotaCallbacks&);
 
 #if INSIDE_BLINK
-    BLINK_PLATFORM_EXPORT WebStorageQuotaCallbacks(const PassOwnPtrWillBeRawPtr<StorageQuotaCallbacks>&);
+    BLINK_PLATFORM_EXPORT WebStorageQuotaCallbacks(StorageQuotaCallbacks*);
 #endif
 
     // Callback for WebFrameClient::queryStorageUsageAndQuota.
@@ -70,7 +67,7 @@ public:
     BLINK_PLATFORM_EXPORT void didFail(WebStorageQuotaError);
 
 private:
-    WebPrivatePtr<WebStorageQuotaCallbacksPrivate> m_private;
+    WebPrivatePtr<StorageQuotaCallbacks> m_private;
 };
 
 } // namespace blink