Oilpan: move WebPluginLoadObserver to the heap.

third_party/WebKit/Source/web/WebPluginLoadObserver.h

Index: third_party/WebKit/Source/web/WebPluginLoadObserver.h
diff --git a/third_party/WebKit/Source/web/WebPluginLoadObserver.h b/third_party/WebKit/Source/web/WebPluginLoadObserver.h
index 3e191686bda790dafd30e127c3af694dca2be4a0..25ecd7a1cd21cf29c4a0e7d07367a8fa6010cfa7 100644
--- a/third_party/WebKit/Source/web/WebPluginLoadObserver.h
+++ b/third_party/WebKit/Source/web/WebPluginLoadObserver.h
@@ -31,6 +31,7 @@
 #ifndef WebPluginLoadObserver_h
 #define WebPluginLoadObserver_h
 
+#include "platform/heap/Handle.h"
 #include "public/platform/WebURL.h"
 
 namespace blink {
@@ -38,26 +39,33 @@ namespace blink {
 class WebPluginContainerImpl;
 struct WebURLError;
 
-class WebPluginLoadObserver {
+class WebPluginLoadObserver final : public NoBaseWillBeGarbageCollectedFinalized<WebPluginLoadObserver> {
 public:
-    WebPluginLoadObserver(WebPluginContainerImpl* pluginContainer,
-                          const WebURL& notifyURL, void* notifyData)
-        : m_pluginContainer(pluginContainer)
-        , m_notifyURL(notifyURL)
-        , m_notifyData(notifyData)
+    static PassOwnPtrWillBeRawPtr<WebPluginLoadObserver> create(WebPluginContainerImpl* pluginContainer, const WebURL& notifyURL, void* notifyData)
     {
+        return adoptPtrWillBeNoop(new WebPluginLoadObserver(pluginContainer, notifyURL, notifyData));
     }
-
     ~WebPluginLoadObserver();
 
     const WebURL& url() const { return m_notifyURL; }
 
-    void clearPluginContainer() { m_pluginContainer = 0; }
+#if !ENABLE(OILPAN)
+    void clearPluginContainer() { m_pluginContainer = nullptr; }
+#endif
     void didFinishLoading();
     void didFailLoading(const WebURLError&);
 
+    DECLARE_TRACE();
+
 private:
-    WebPluginContainerImpl* m_pluginContainer;
+    WebPluginLoadObserver(WebPluginContainerImpl* pluginContainer, const WebURL& notifyURL, void* notifyData)
+        : m_pluginContainer(pluginContainer)
+        , m_notifyURL(notifyURL)
+        , m_notifyData(notifyData)
+    {
+    }
+
+    RawPtrWillBeWeakMember<WebPluginContainerImpl> m_pluginContainer;
     WebURL m_notifyURL;
     void* m_notifyData;
 };