Delete most web intents code.

chrome/browser/ui/intents/web_intent_picker_model_observer.h

-// Copyright (c) 2012 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_UI_INTENTS_WEB_INTENT_PICKER_MODEL_OBSERVER_H_
-#define CHROME_BROWSER_UI_INTENTS_WEB_INTENT_PICKER_MODEL_OBSERVER_H_
-
-#include "base/string16.h"
-
-class GURL;
-class WebIntentPickerModel;
-
-// Observer for changes to the WebIntentPickerModel.
-class WebIntentPickerModelObserver {
- public:
-  virtual ~WebIntentPickerModelObserver() {}
-
-  // Called when |model| has changed.
-  virtual void OnModelChanged(WebIntentPickerModel* model) = 0;
-
-  // Called when the favicon at |index| in |model| has changed.
-  virtual void OnFaviconChanged(WebIntentPickerModel* model, size_t index) = 0;
-
-  // Called when the extension with |extension_id| has its icon changed.
-  virtual void OnExtensionIconChanged(WebIntentPickerModel* model,
-                                      const std::string& extension_id) = 0;
-
-  // Called when the inline disposition should be displayed for |model|.
-  virtual void OnInlineDisposition(const string16& title,
-                                   const GURL& url) = 0;
-};
-
-#endif  // CHROME_BROWSER_UI_INTENTS_WEB_INTENT_PICKER_MODEL_OBSERVER_H_