Update touch selection to only modify one selection point at a time.

content/browser/renderer_host/input/input_router_impl.h

 // Copyright 2013 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_INPUT_ROUTER_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_IMPL_H_
 
 #include <queue>
 
 #include "base/basictypes.h"
@@ skipping 81 matching lines @@
                                InputEventAckState ack_result) override;
 
   // GetureEventFilterClient
   virtual void SendGestureEventImmediately(
       const GestureEventWithLatencyInfo& gesture_event) override;
   virtual void OnGestureEventAck(const GestureEventWithLatencyInfo& event,
                                  InputEventAckState ack_result) override;
 
   bool SendMoveCaret(scoped_ptr<IPC::Message> message);
   bool SendSelectRange(scoped_ptr<IPC::Message> message);
+  bool SendMoveRangeSelectionExtent(scoped_ptr<IPC::Message> message);
   bool Send(IPC::Message* message);
 
   // Filters and forwards |input_event| to the appropriate handler.
   void FilterAndSendWebInputEvent(const blink::WebInputEvent& input_event,
                                   const ui::LatencyInfo& latency_info,
                                   bool is_keyboard_shortcut);
 
   // Utility routine for filtering and forwarding |input_event| to the
   // appropriate handler. |input_event| will be offered to the overscroll
   // controller, client and renderer, in that order.
@@ skipping 33 matching lines @@
   // Given a Touchpad GesturePinchUpdate event, create and send a synthetic
   // wheel event for it.
   void SendSyntheticWheelEventForPinch(
       const GestureEventWithLatencyInfo& pinch_event);
 
   // IPC message handlers
   void OnInputEventAck(const InputHostMsg_HandleInputEvent_ACK_Params& ack);
   void OnDidOverscroll(const DidOverscrollParams& params);
   void OnMsgMoveCaretAck();
   void OnSelectRangeAck();
+  void OnMoveRangeSelectionExtentAck();
   void OnHasTouchEventHandlers(bool has_handlers);
   void OnSetTouchAction(TouchAction touch_action);
 
   // Indicates the source of an ack provided to |ProcessInputEventAck()|.
   // The source is tracked by |current_ack_source_|, which aids in ack routing.
   enum AckSource {
     RENDERER,
     CLIENT,
     IGNORING_DISPOSITION,
     ACK_SOURCE_NONE
@@ skipping 49 matching lines @@
   InputRouterClient* client_;
   InputAckHandler* ack_handler_;
   int routing_id_;
 
   // (Similar to |mouse_move_pending_|.) True while waiting for SelectRange_ACK.
   bool select_range_pending_;
 
   // (Similar to |next_mouse_move_|.) The next SelectRange to send, if any.
   scoped_ptr<IPC::Message> next_selection_range_;
 
+  // (Similar to |mouse_move_pending_|.) True while waiting for
+  // MoveRangeSelectionExtent_ACK.
+  bool move_range_selection_extent_pending_;
+
+  // (Similar to |next_mouse_move_|.) The next MoveRangeSelectionExtent to
+  // send, if any.
+  scoped_ptr<IPC::Message> next_range_selection_extent_move_;
+
   // (Similar to |mouse_move_pending_|.) True while waiting for MoveCaret_ACK.
   bool move_caret_pending_;
 
   // (Similar to |next_mouse_move_|.) The next MoveCaret to send, if any.
   scoped_ptr<IPC::Message> next_move_caret_;
 
   // True if a mouse move event was sent to the render view and we are waiting
   // for a corresponding InputHostMsg_HandleInputEvent_ACK message.
   bool mouse_move_pending_;
 
@@ skipping 41 matching lines @@
   TouchActionFilter touch_action_filter_;
   InputEventStreamValidator input_stream_validator_;
   InputEventStreamValidator output_stream_validator_;
 
   DISALLOW_COPY_AND_ASSIGN(InputRouterImpl);
 };
 
 }  // namespace content
 
 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_IMPL_H_