Move blink::PluginData, blink::PluginInfo, blink::MimeTypeInfo to oilpan heap.

third_party/WebKit/Source/modules/plugins/DOMMimeType.h

Index: third_party/WebKit/Source/modules/plugins/DOMMimeType.h
diff --git a/third_party/WebKit/Source/modules/plugins/DOMMimeType.h b/third_party/WebKit/Source/modules/plugins/DOMMimeType.h
index 14b4b4458c678c96468dd6865bcef61c3b8d2851..de887f7f00d666c9c9379b616e5b02744ce0f6ad 100644
--- a/third_party/WebKit/Source/modules/plugins/DOMMimeType.h
+++ b/third_party/WebKit/Source/modules/plugins/DOMMimeType.h
@@ -39,10 +39,9 @@ class DOMMimeType final : public GarbageCollectedFinalized<DOMMimeType>,
   DEFINE_WRAPPERTYPEINFO();
 
  public:
-  static DOMMimeType* Create(PassRefPtr<PluginData> plugin_data,
-                             LocalFrame* frame,
-                             unsigned index) {
-    return new DOMMimeType(std::move(plugin_data), frame, index);
+  static DOMMimeType* Create(LocalFrame* frame,
+                             const MimeClassInfo& mime_class_info) {
+    return new DOMMimeType(frame, mime_class_info);
   }
   virtual ~DOMMimeType();
 
@@ -54,14 +53,9 @@ class DOMMimeType final : public GarbageCollectedFinalized<DOMMimeType>,
   DECLARE_VIRTUAL_TRACE();
 
  private:
-  DOMMimeType(PassRefPtr<PluginData>, LocalFrame*, unsigned index);
+  DOMMimeType(LocalFrame*, const MimeClassInfo&);
 
-  const MimeClassInfo& GetMimeClassInfo() const {
-    return plugin_data_->Mimes()[index_];
-  }
-
-  RefPtr<PluginData> plugin_data_;
-  unsigned index_;
+  Member<const MimeClassInfo> mime_class_info_;
 };
 
 }  // namespace blink