Add a hook for capturing a user profile photo and saving it to file and local state.

chrome/browser/chromeos/options/take_photo_dialog.h

 // Copyright (c) 2011 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 CHROME_BROWSER_CHROMEOS_OPTIONS_TAKE_PHOTO_DIALOG_H_
 #define CHROME_BROWSER_CHROMEOS_OPTIONS_TAKE_PHOTO_DIALOG_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
+#include "base/observer_list.h"
 #include "chrome/browser/chromeos/login/camera_controller.h"
 #include "chrome/browser/chromeos/login/take_photo_view.h"
 #include "content/common/notification_observer.h"
 #include "content/common/notification_registrar.h"
 #include "views/window/dialog_delegate.h"
 
 namespace views {
 class View;
 }
 
@@ skipping 30 matching lines @@
   virtual void GetAccessibleState(ui::AccessibleViewState* state);
 
   // TakePhotoView::Delegate overrides.
   virtual void OnCapturingStarted();
   virtual void OnCapturingStopped();
 
   // CameraController::Delegate implementation:
   virtual void OnCaptureSuccess();
   virtual void OnCaptureFailure();
 
+  // Interface that observers of this dialog must implement in order
+  // to receive notification for capture success/failure.
+  class Observer {
+   public:
+    // Called when image is captured and is displayed
+    virtual void OnCaptureSuccess(
+        TakePhotoDialog* dialog,
+        TakePhotoView* view) = 0;
+    // Called when capture fails and error image is displayed
+    virtual void OnCaptureFailure(
+        TakePhotoDialog* dialog,
+        TakePhotoView* view) = 0;
+    // Called when capture is stopped and image is not being updated
+    virtual void OnCapturingStopped(
+        TakePhotoDialog* dialog,
+        TakePhotoView* view) = 0;
+
+   protected:
+    virtual ~Observer() {}
+  };
+
+  void AddObserver(Observer* obs);
+  void RemoveObserver(Observer* obs);
+
+  void NotifyOnCaptureSuccess();
+  void NotifyOnCaptureFailure();
+  void NotifyOnCapturingStopped();
+
   // NotificationObserver implementation:
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
  protected:
   // views::View overrides:
   virtual void Layout();
   virtual gfx::Size GetPreferredSize();
 
  private:
   // Starts initializing the camera and shows the appropriate status on the
   // screen.
   void InitCamera();
 
   TakePhotoView* take_photo_view_;
 
   CameraController camera_controller_;
 
   NotificationRegistrar registrar_;
 
   Delegate* delegate_;
 
+  ObserverList<Observer> observer_list_;
+
   DISALLOW_COPY_AND_ASSIGN(TakePhotoDialog);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_OPTIONS_TAKE_PHOTO_DIALOG_H_