Remove rendundant WebLocalFrame parameter in various plugin code.

components/plugins/renderer/plugin_placeholder.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_PLUGINS_RENDERER_PLUGIN_PLACEHOLDER_H_
 #define COMPONENTS_PLUGINS_RENDERER_PLUGIN_PLACEHOLDER_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "components/plugins/renderer/webview_plugin.h"
 #include "content/public/renderer/render_frame_observer.h"
 #include "gin/handle.h"
 #include "gin/wrappable.h"
 #include "third_party/WebKit/public/web/WebKit.h"
 #include "third_party/WebKit/public/web/WebPluginParams.h"
 
 namespace plugins {
 
 // This abstract class is the base class of all plugin placeholders.
 class PluginPlaceholderBase : public content::RenderFrameObserver,
                               public WebViewPlugin::Delegate {
  public:
-  // |render_frame| and |frame| are weak pointers. If either one is going away,
-  // our |plugin_| will be destroyed as well and will notify us.
+  // |render_frame| is a weak pointer. If it is going away, our |plugin_| will
+  // be destroyed as well and will notify us.
   PluginPlaceholderBase(content::RenderFrame* render_frame,
-                        blink::WebLocalFrame* frame,
                         const blink::WebPluginParams& params,
                         const std::string& html_data);
-
   ~PluginPlaceholderBase() override;
 
   WebViewPlugin* plugin() { return plugin_; }
 
  protected:
-  blink::WebLocalFrame* GetFrame();
   const blink::WebPluginParams& GetPluginParams() const;
 
   // WebViewPlugin::Delegate methods:
   void ShowContextMenu(const blink::WebMouseEvent&) override;
   void PluginDestroyed() override;
   v8::Local<v8::Object> GetV8ScriptableObject(
       v8::Isolate* isolate) const override;
   bool IsErrorPlaceholder() override;
 
  protected:
   // Hide this placeholder.
   void HidePlugin();
-  bool hidden() { return hidden_; }
+  bool hidden() const { return hidden_; }
 
   // JavaScript callbacks:
   void HideCallback();
 
  private:
   // RenderFrameObserver methods:
   void OnDestruct() override;
 
-  blink::WebLocalFrame* frame_;
   blink::WebPluginParams plugin_params_;
   WebViewPlugin* plugin_;
 
   bool hidden_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginPlaceholderBase);
 };
 
 // A basic placeholder that supports only hiding.
 class PluginPlaceholder final : public PluginPlaceholderBase,
                                 public gin::Wrappable<PluginPlaceholder> {
  public:
   static gin::WrapperInfo kWrapperInfo;
 
   PluginPlaceholder(content::RenderFrame* render_frame,
-                    blink::WebLocalFrame* frame,
                     const blink::WebPluginParams& params,
                     const std::string& html_data);
   ~PluginPlaceholder() override;
 
  private:
   // WebViewPlugin::Delegate methods:
   v8::Local<v8::Value> GetV8Handle(v8::Isolate* isolate) final;
 
   // gin::Wrappable method:
   gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
       v8::Isolate* isolate) override;
 };
 
 }  // namespace plugins
 
 #endif  // COMPONENTS_PLUGINS_RENDERER_PLUGIN_PLACEHOLDER_H_