Support multi-button press for synthetic mouse events

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 "build/build_config.h"
@@ skipping 97 matching lines @@
 IPC_STRUCT_TRAITS_BEGIN(content::SyntheticTapGestureParams)
   IPC_STRUCT_TRAITS_PARENT(content::SyntheticGestureParams)
   IPC_STRUCT_TRAITS_MEMBER(position)
   IPC_STRUCT_TRAITS_MEMBER(duration_ms)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::SyntheticPointerActionParams)
   IPC_STRUCT_TRAITS_MEMBER(pointer_action_type_)
   IPC_STRUCT_TRAITS_MEMBER(index_)
   IPC_STRUCT_TRAITS_MEMBER(position_)
+  IPC_STRUCT_TRAITS_MEMBER(button_)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::SyntheticPointerActionListParams)
   IPC_STRUCT_TRAITS_PARENT(content::SyntheticGestureParams)
   IPC_STRUCT_TRAITS_MEMBER(params)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::InputEventAck)
   IPC_STRUCT_TRAITS_MEMBER(source)
   IPC_STRUCT_TRAITS_MEMBER(type)
@@ skipping 188 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.