Route touchmove existence notifications to the TouchEventQueue

content/common/input_messages.h

 // Copyright (c) 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.
 
 // IPC messages for input events and other messages that require processing in
 // order relative to input events.
 // Multiply-included message file, hence no include guard.
 
 #include "base/strings/string16.h"
 #include "content/common/content_export.h"
@@ skipping 241 matching lines @@
 // -----------------------------------------------------------------------------
 // Messages sent from the renderer to the browser.
 
 // Acknowledges receipt of a InputMsg_HandleInputEvent message.
 IPC_MESSAGE_ROUTED1(InputHostMsg_HandleInputEvent_ACK,
                     content::InputEventAck /* ack */)
 
 IPC_MESSAGE_ROUTED1(InputHostMsg_QueueSyntheticGesture,
                     content::SyntheticGesturePacket)
 
+// Notifies whether there are JavaScript touch event handlers or not.
+IPC_MESSAGE_ROUTED1(InputHostMsg_HasTouchEventHandlers, bool /* has_handlers */)
+
+// Notifies whether there are JavaScript touchmove event handlers or not.
+IPC_MESSAGE_ROUTED1(InputHostMsg_HasTouchMoveEventHandlers,
+                    bool /* has_handlers */)
+
 // Notifies the allowed touch actions for a new touch point.
 IPC_MESSAGE_ROUTED1(InputHostMsg_SetTouchAction,
                     content::TouchAction /* touch_action */)
 
 // Sent by the compositor when input scroll events are dropped due to bounds
 // restrictions on the root scroll offset.
 IPC_MESSAGE_ROUTED1(InputHostMsg_DidOverscroll,
                     content::DidOverscrollParams /* params */)
 
 // Sent by the compositor when a fling animation is stopped.
@@ skipping 14 matching lines @@
 // This IPC message sends the character bounds after every composition change
 // to always have correct bound info.
 IPC_MESSAGE_ROUTED2(InputHostMsg_ImeCompositionRangeChanged,
                     gfx::Range /* composition range */,
                     std::vector<gfx::Rect> /* character bounds */)
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent InputMsg, then ifdefs for platform specific InputMsg, then
 // platform independent InputHostMsg, then ifdefs for platform specific
 // InputHostMsg.