Add a new resizer corner overlay.

chrome/common/render_messages_internal.h

 // Copyright (c) 2006-2008 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.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <string>
 #include <vector>
@@ skipping 52 matching lines @@
   // first, and we need to update it
   IPC_MESSAGE_ROUTED1(ViewMsg_CreatingNew_ACK,
                       gfx::NativeViewId /* parent_hwnd */)
 
   // Tells the render view to close.
   IPC_MESSAGE_ROUTED0(ViewMsg_Close)
 
   // Tells the render view to change its size.  A ViewHostMsg_PaintRect message
   // is generated in response provided new_size is not empty and not equal to
   // the view's current size.  The generated ViewHostMsg_PaintRect message will
-  // have the IS_RESIZE_ACK flag set.
-  IPC_MESSAGE_ROUTED1(ViewMsg_Resize,
-                      gfx::Size /* new_size */)
+  // have the IS_RESIZE_ACK flag set. It also receives the resizer rect so that
+  // we don't have to fetch it every time WebKit asks for it.
+  IPC_MESSAGE_ROUTED2(ViewMsg_Resize,
+                      gfx::Size /* new_size */,
+                      gfx::Rect /* resizer_rect */)
 
   // Sent to inform the view that it was hidden.  This allows it to reduce its
   // resource utilization.
   IPC_MESSAGE_ROUTED0(ViewMsg_WasHidden)
 
   // Tells the render view that it is no longer hidden (see WasHidden), and the
   // render view is expected to respond with a full repaint if needs_repainting
   // is true.  In that case, the generated ViewHostMsg_PaintRect message will
   // have the IS_RESTORE_ACK flag set.  If needs_repainting is false, then this
   // message does not trigger a message in response.
@@ skipping 1015 matching lines @@
 
   // Get the list of proxies to use for |url|, as a semicolon delimited list
   // of "<TYPE> <HOST>:<PORT>" | "DIRECT". See also
   // PluginProcessHostMsg_ResolveProxy which does the same thing.
   IPC_SYNC_MESSAGE_CONTROL1_2(ViewHostMsg_ResolveProxy,
                               GURL /* url */,
                               int /* network error */,
                               std::string /* proxy list */)
 
 IPC_END_MESSAGES(ViewHost)