mojo events: Add |screen_location| to LocationData.

ui/events/win/events_win.cc

 // Copyright (c) 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.
 
 #include <windowsx.h>
 
 #include "ui/events/event_constants.h"
 
 #include "base/logging.h"
 #include "base/time/time.h"
@@ skipping 223 matching lines @@
     // LPARAM, and is in screen coordinates so we have to convert to client.
     native_point.x = GET_X_LPARAM(native_event.lParam);
     native_point.y = GET_Y_LPARAM(native_event.lParam);
   }
   ScreenToClient(native_event.hwnd, &native_point);
   return gfx::Point(native_point);
 }
 
 gfx::Point EventSystemLocationFromNative(
     const base::NativeEvent& native_event) {
-  // TODO(ben): Needs to always return screen position here. Returning normal
-  // origin for now since that's obviously wrong.
-  return gfx::Point(0, 0);
+  POINT global_point = { static_cast<short>(LOWORD(native_event.lParam)),
+                         static_cast<short>(HIWORD(native_event.lParam)) };
+  ClientToScreen(native_event.hwnd, &global_point);
+  return gfx::Point(global_point);
 }
 
 KeyboardCode KeyboardCodeFromNative(const base::NativeEvent& native_event) {
   return KeyboardCodeForWindowsKeyCode(native_event.wParam);
 }
 
 const char* CodeFromNative(const base::NativeEvent& native_event) {
   const uint16 scan_code = GetScanCodeFromLParam(native_event.lParam);
   return CodeForWindowsScanCode(scan_code);
 }
@@ skipping 152 matching lines @@
 }
 
 LPARAM GetLParamFromScanCode(uint16 scan_code) {
   LPARAM l_param = static_cast<LPARAM>(scan_code & 0x00FF) << 16;
   if ((scan_code & 0xE000) == 0xE000)
     l_param |= (1 << 24);
   return l_param;
 }
 
 }  // namespace ui