Reland: Implement Aura side of unified touch text selection for contents

content/browser/renderer_host/input/touch_selection_controller.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 CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_SELECTION_CONTROLLER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_SELECTION_CONTROLLER_H_
 
 #include "cc/output/viewport_selection_bound.h"
 #include "content/browser/renderer_host/input/selection_event_type.h"
 #include "content/browser/renderer_host/input/touch_handle.h"
@@ skipping 64 matching lines @@
   // To be called when the editability of the focused region changes.
   void OnSelectionEditable(bool editable);
 
   // To be called when the contents of the focused region changes.
   void OnSelectionEmpty(bool empty);
 
   // Ticks an active animation, as requested to the client by |SetNeedsAnimate|.
   // Returns true if an animation is active and requires further ticking.
   bool Animate(base::TimeTicks animate_time);
 
+  void ActivateSelection(const cc::ViewportSelectionBound& start,
+                         const cc::ViewportSelectionBound& end);
+
+  bool is_insertion_active() const { return is_insertion_active_; }
+  bool is_selection_active() const { return is_selection_active_; }
+
  private:
   enum InputEventType { TAP, LONG_PRESS, INPUT_EVENT_TYPE_NONE };
 
   // TouchHandleClient implementation.
   void OnHandleDragBegin(const TouchHandle& handle) override;
   void OnHandleDragUpdate(const TouchHandle& handle,
                           const gfx::PointF& new_position) override;
   void OnHandleDragEnd(const TouchHandle& handle) override;
   void OnHandleTapped(const TouchHandle& handle) override;
   void SetNeedsAnimate() override;
@@ skipping 46 matching lines @@
   bool selection_editable_;
 
   bool temporarily_hidden_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchSelectionController);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_SELECTION_CONTROLLER_H_