Simplify the magic required to create IPC message headers a bit.

chrome/browser/renderer_host/render_widget_host.cc

 // Copyright (c) 2010 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 "chrome/browser/renderer_host/render_widget_host.h"
 
 #include "app/keyboard_codes.h"
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
@@ skipping 825 matching lines @@
   if (!is_accelerated_compositing_active_) {
     const size_t size = params.bitmap_rect.height() *
         params.bitmap_rect.width() * 4;
     TransportDIB* dib = process_->GetTransportDIB(params.bitmap);
 
     // If gpu process does painting, scroll_rect and copy_rects are always empty
     // and backing store is never used.
     if (dib) {
       if (dib->size() < size) {
         DLOG(WARNING) << "Transport DIB too small for given rectangle";
-        process()->ReceivedBadMessage(ViewHostMsg_UpdateRect__ID);
+        process()->ReceivedBadMessage(ViewHostMsg_UpdateRect::ID);
       } else {
         // Scroll the backing store.
         if (!params.scroll_rect.IsEmpty()) {
           ScrollBackingStoreRect(params.dx, params.dy,
                                  params.scroll_rect,
                                  params.view_size);
         }
 
         // Paint the backing store. This will update it with the
         // renderer-supplied bits. The view will read out of the backing store
@@ skipping 87 matching lines @@
   if (!coalesced_mouse_wheel_events_.empty()) {
     WebMouseWheelEvent next_wheel_event =
         coalesced_mouse_wheel_events_.front();
     coalesced_mouse_wheel_events_.pop_front();
     ForwardWheelEvent(next_wheel_event);
   }
 }
 
 void RenderWidgetHost::OnMsgFocus() {
   // Only RenderViewHost can deal with that message.
-  process()->ReceivedBadMessage(ViewHostMsg_Focus__ID);
+  process()->ReceivedBadMessage(ViewHostMsg_Focus::ID);
 }
 
 void RenderWidgetHost::OnMsgBlur() {
   // Only RenderViewHost can deal with that message.
-  process()->ReceivedBadMessage(ViewHostMsg_Blur__ID);
+  process()->ReceivedBadMessage(ViewHostMsg_Blur::ID);
 }
 
 void RenderWidgetHost::OnMsgSetCursor(const WebCursor& cursor) {
   if (!view_) {
     return;
   }
   view_->UpdateCursor(cursor);
 }
 
 void RenderWidgetHost::OnMsgImeUpdateTextInputState(
@@ skipping 241 matching lines @@
     // of this key event.
     if (!processed && !is_hidden_ && !front_item.skip_in_browser) {
       UnhandledKeyboardEvent(front_item);
 
       // WARNING: This RenderWidgetHost can be deallocated at this point
       // (i.e.  in the case of Ctrl+W, where the call to
       // UnhandledKeyboardEvent destroys this RenderWidgetHost).
     }
   }
 }