Experimental app list: custom launcher pages handle web contents events.

apps/custom_launcher_page_contents.h

 // Copyright 2014 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 APPS_CUSTOM_LAUNCHER_PAGE_CONTENTS_H_
 #define APPS_CUSTOM_LAUNCHER_PAGE_CONTENTS_H_
 
 #include "base/memory/scoped_ptr.h"
+#include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "extensions/browser/extension_function_dispatcher.h"
 
 class GURL;
 
 namespace content {
 class BrowserContext;
 }
 
 namespace apps {
 
+class AppDelegate;
+class AppWebContentsHelper;
+
 // Manages the web contents for extension-hosted launcher pages. The
 // implementation for this class should create and maintain the WebContents for
 // the page, and handle any message passing between the web contents and the
 // extension system.
 class CustomLauncherPageContents
-    : public content::WebContentsObserver,
+    : public content::WebContentsDelegate,
+      public content::WebContentsObserver,
       public extensions::ExtensionFunctionDispatcher::Delegate {
  public:
-  CustomLauncherPageContents();
+  // Takes ownership of |app_delegate|.
+  CustomLauncherPageContents(AppDelegate* app_delegate,

[benwells, 2014/08/04 02:35:20]

If you make this a scoped_ptr<AppDelegate> it will communicate that it takes
ownership all by itself.

[Matt Giuca, 2014/08/04 06:25:58]

Done.

(After discussing with Sam about how to do it --- is this what you meant? Ain't
never seen this pattern before; I've always done it and seen it done with a raw
pointer.)

(AppWindow takes a raw pointer too, which is what this code is inspired by.)

[benwells, 2014/08/04 06:53:16]

Yes was what I meant. I'm not sure if you've got the Pass calls in the right
places but if it compiles, you have.

I haven't always done things this way but my understanding is it is the
preferred way of passing pointers with ownership.

+                             const std::string& extension_id);
   virtual ~CustomLauncherPageContents();
 
   // Called to initialize and load the WebContents.
   void Initialize(content::BrowserContext* context, const GURL& url);
 
   content::WebContents* web_contents() const { return web_contents_.get(); }
 
+  // content::WebContentsDelegate overrides:
+  virtual content::WebContents* OpenURLFromTab(
+      content::WebContents* source,
+      const content::OpenURLParams& params) OVERRIDE;
+  virtual void AddNewContents(content::WebContents* source,
+                              content::WebContents* new_contents,
+                              WindowOpenDisposition disposition,
+                              const gfx::Rect& initial_pos,
+                              bool user_gesture,
+                              bool* was_blocked) OVERRIDE;
+  virtual bool IsPopupOrPanel(
+      const content::WebContents* source) const OVERRIDE;
+  virtual bool ShouldSuppressDialogs() OVERRIDE;
+  virtual bool PreHandleGestureEvent(
+      content::WebContents* source,
+      const blink::WebGestureEvent& event) OVERRIDE;
+  virtual content::ColorChooser* OpenColorChooser(
+      content::WebContents* web_contents,
+      SkColor color,
+      const std::vector<content::ColorSuggestion>& suggestions) OVERRIDE;
+  virtual void RunFileChooser(
+      content::WebContents* tab,
+      const content::FileChooserParams& params) OVERRIDE;
+  virtual void RequestToLockMouse(content::WebContents* web_contents,
+                                  bool user_gesture,
+                                  bool last_unlocked_by_target) OVERRIDE;
+  virtual void RequestMediaAccessPermission(
+      content::WebContents* web_contents,
+      const content::MediaStreamRequest& request,
+      const content::MediaResponseCallback& callback) OVERRIDE;
+
  private:
   // content::WebContentsObserver overrides:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // extensions::ExtensionFunctionDispatcher::Delegate overrides:
   virtual extensions::WindowController* GetExtensionWindowController()
       const OVERRIDE;
   virtual content::WebContents* GetAssociatedWebContents() const OVERRIDE;
 
   void OnRequest(const ExtensionHostMsg_Request_Params& params);
 
   scoped_ptr<content::WebContents> web_contents_;
   scoped_ptr<extensions::ExtensionFunctionDispatcher>
       extension_function_dispatcher_;
+  scoped_ptr<AppDelegate> app_delegate_;
+  scoped_ptr<AppWebContentsHelper> helper_;
+
+  std::string extension_id_;
 
   DISALLOW_COPY_AND_ASSIGN(CustomLauncherPageContents);
 };
 
 }  // namespace apps
 
 #endif  // APPS_CUSTOM_LAUNCHER_PAGE_CONTENTS_H_