Oilpan: move WebDevToolsFrontend to the heap.

public/web/WebDevToolsFrontend.h

Index: public/web/WebDevToolsFrontend.h
diff --git a/public/web/WebDevToolsFrontend.h b/public/web/WebDevToolsFrontend.h
index d457c63b6263af647fb582f37335cb4e9aec7e1e..2f0c57914ef15e8fb32da522438b71eb822ee4e1 100644
--- a/public/web/WebDevToolsFrontend.h
+++ b/public/web/WebDevToolsFrontend.h
@@ -32,10 +32,17 @@
 #define WebDevToolsFrontend_h
 
 #include "../platform/WebCommon.h"
+#include "../platform/WebPrivatePtr.h"
+
+#if BLINK_IMPLEMENTATION
+#include "platform/heap/Handle.h"
+#include "wtf/Forward.h"
+#endif
 
 namespace blink {
 
 class WebDevToolsFrontendClient;
+class WebDevToolsFrontendPrivate;
 class WebLocalFrame;
 class WebString;
 class WebView;
@@ -44,6 +51,12 @@ class WebView;
 // direct and delegate Apis to the host.
 class WebDevToolsFrontend {
 public:
+#if BLINK_IMPLEMENTATION
+    WebDevToolsFrontend(PassRefPtrWillBeRawPtr<WebDevToolsFrontendPrivate> devtoolsFrontend);
+#endif
+
+    virtual ~WebDevToolsFrontend();
+
     // FIXME: remove once migrated to the WebLocalFrame.
     BLINK_EXPORT static WebDevToolsFrontend* create(
         WebView*,
@@ -55,9 +68,12 @@ public:
         WebDevToolsFrontendClient*,
         const WebString& applicationLocale);
 
-    virtual ~WebDevToolsFrontend() {}
+private:
+    WebDevToolsFrontend();
+
+    WebPrivatePtr<WebDevToolsFrontendPrivate> m_private;
 };
 
 } // namespace blink
 
-#endif
+#endif // WebDevToolsFrontend_h