Fix Ash on Windows multi-monitor support and snap-view sizing.

ui/aura/remote_root_window_host_win.cc

Index: ui/aura/remote_root_window_host_win.cc
diff --git a/ui/aura/remote_root_window_host_win.cc b/ui/aura/remote_root_window_host_win.cc
index d6b72dff54aae86e7029140ca7ac52a4bf314c54..428ea6d3f8531c34c19ecd0cceac93f49170a293 100644
--- a/ui/aura/remote_root_window_host_win.cc
+++ b/ui/aura/remote_root_window_host_win.cc
@@ -161,6 +161,8 @@ bool RemoteRootWindowHostWin::OnMessageReceived(const IPC::Message& message) {
                         OnWindowActivated)
     IPC_MESSAGE_HANDLER(MetroViewerHostMsg_SetCursorPosAck,
                         OnSetCursorPosAck)
+    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_WindowSizeChanged,
+                        OnWindowSizeChanged)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -502,6 +504,10 @@ void RemoteRootWindowHostWin::OnSetCursorPosAck() {
   ignore_mouse_moves_until_set_cursor_ack_ = false;
 }
 
+void RemoteRootWindowHostWin::OnWindowSizeChanged(int32 width, int32 height) {
+  SetBounds(gfx::Rect(0, 0, width, height));
+}
+
 void RemoteRootWindowHostWin::DispatchKeyboardMessage(ui::EventType type,
                                                       uint32 vkey,
                                                       uint32 repeat_count,