Move chooser_controller directory from //components to //chrome/browser

components/chooser_controller/chooser_controller.h

-// Copyright 2016 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_CHOOSER_CONTROLLER_CHOOSER_CONTROLLER_H_
-#define COMPONENTS_CHOOSER_CONTROLLER_CHOOSER_CONTROLLER_H_
-
-#include "base/macros.h"
-#include "base/strings/string16.h"
-
-namespace content {
-class RenderFrameHost;
-}
-
-namespace url {
-class Origin;
-}
-
-// Subclass ChooserController to implement a chooser, which has some
-// introductory text and a list of options that users can pick one of.
-// Your subclass must define the set of options users can pick from;
-// the actions taken after users select an item or press the 'Cancel'
-// button or the chooser is closed.
-// After Select/Cancel/Close is called, this object is destroyed and
-// calls back into it are not allowed.
-class ChooserController {
- public:
-  explicit ChooserController(content::RenderFrameHost* owner);
-  virtual ~ChooserController();
-
-  // Since the set of options can change while the UI is visible an
-  // implementation should register an observer.
-  class Observer {
-   public:
-    // Called after the options list is initialized for the first time.
-    // OnOptionsInitialized should only be called once.
-    virtual void OnOptionsInitialized() = 0;
-
-    // Called after GetOption(index) has been added to the options and the
-    // newly added option is the last element in the options list. Calling
-    // GetOption(index) from inside a call to OnOptionAdded will see the
-    // added string since the options have already been updated.
-    virtual void OnOptionAdded(size_t index) = 0;
-
-    // Called when GetOption(index) is no longer present, and all later
-    // options have been moved earlier by 1 slot. Calling GetOption(index)
-    // from inside a call to OnOptionRemoved will NOT see the removed string
-    // since the options have already been updated.
-    virtual void OnOptionRemoved(size_t index) = 0;
-
-   protected:
-    virtual ~Observer() {}
-  };
-
-  // Return the origin URL to be displayed on the chooser title.
-  url::Origin GetOrigin() const;
-
-  // The number of options users can pick from. For example, it can be
-  // the number of USB/Bluetooth device names which are listed in the
-  // chooser so that users can grant permission.
-  virtual size_t NumOptions() const = 0;
-
-  // The |index|th option string which is listed in the chooser.
-  virtual base::string16 GetOption(size_t index) const = 0;
-
-  // These three functions are called just before this object is destroyed:
-
-  // Called when the user selects the |index|th element from the dialog.
-  virtual void Select(size_t index) = 0;
-
-  // Called when the user presses the 'Cancel' button in the dialog.
-  virtual void Cancel() = 0;
-
-  // Called when the user clicks outside the dialog or the dialog otherwise
-  // closes without the user taking an explicit action.
-  virtual void Close() = 0;
-
-  // Open help center URL.
-  virtual void OpenHelpCenterUrl() const = 0;
-
-  // Only one observer may be registered at a time.
-  void set_observer(Observer* observer) { observer_ = observer; }
-  Observer* observer() const { return observer_; }
-
- private:
-  content::RenderFrameHost* owning_frame_;
-  Observer* observer_ = nullptr;
-
-  DISALLOW_COPY_AND_ASSIGN(ChooserController);
-};
-
-#endif  // COMPONENTS_CHOOSER_CONTROLLER_CHOOSER_CONTROLLER_H_