Revert of IPC::ParamTraits for ui::Event (towards ui::Events over mojo IPC)

ui/metro_viewer/metro_viewer_messages.h

 // Copyright 2012 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.
 
 // Multiply-included message file, no include guard.
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "ipc/ipc_message_macros.h"
 #include "ui/events/event_constants.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/metro_viewer/ime_types.h"
 
 #define IPC_MESSAGE_START MetroViewerMsgStart
 
+IPC_ENUM_TRAITS(ui::EventType)
+IPC_ENUM_TRAITS(ui::EventFlags)
+
+// Contains the parameters sent for a mousebutton message.
+IPC_STRUCT_BEGIN(MetroViewerHostMsg_MouseButtonParams)
+
+  IPC_STRUCT_MEMBER(int32_t, x)
+  IPC_STRUCT_MEMBER(int32_t, y)
+  IPC_STRUCT_MEMBER(int32_t, extra)
+  IPC_STRUCT_MEMBER(ui::EventType, event_type)
+  IPC_STRUCT_MEMBER(uint32_t, flags)
+  IPC_STRUCT_MEMBER(ui::EventFlags, changed_button)
+  IPC_STRUCT_MEMBER(bool, is_horizontal_wheel)
+
+IPC_STRUCT_END()
+
 // Messages sent from the viewer to the browser:
 
 // Inform the browser of the surface to target for compositing.
 IPC_MESSAGE_CONTROL2(MetroViewerHostMsg_SetTargetSurface,
                      gfx::NativeViewId /* target hwnd */,
                      float             /* device scale */)
 // Informs the browser that the mouse moved.
 IPC_MESSAGE_CONTROL3(MetroViewerHostMsg_MouseMoved,
                      int32_t, /* x-coordinate */
                      int32_t, /* y-coordinate */
                      int32_t /* flags */)
+// Informs the brower that a mouse button was pressed.
+IPC_MESSAGE_CONTROL1(MetroViewerHostMsg_MouseButton,
+                     MetroViewerHostMsg_MouseButtonParams)
 // Informs the browser that a key was pressed.
 IPC_MESSAGE_CONTROL4(MetroViewerHostMsg_KeyDown,
                      uint32_t, /* virtual key */
                      uint32_t, /* repeat count */
                      uint32_t, /* scan code */
                      uint32_t /* key state */)
 // Informs the browser that a key was released.
 IPC_MESSAGE_CONTROL4(MetroViewerHostMsg_KeyUp,
                      uint32_t, /* virtual key */
                      uint32_t, /* repeat count */
@@ skipping 161 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(right)
   IPC_STRUCT_TRAITS_MEMBER(bottom)
 IPC_STRUCT_TRAITS_END()
 
 // Requests the viewer to update the document context such as attached
 // InputScopes and character bounds.
 IPC_MESSAGE_CONTROL2(
     MetroViewerHostMsg_ImeTextInputClientUpdated,
     std::vector<int32_t>,                       /* InputScope enums */
     std::vector<metro_viewer::CharacterBounds>) /* character bounds */