Improve scrolling performance when there are many windowed plugins in a page....

chrome/common/plugin_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.
 
 #include "base/shared_memory.h"
 #include "chrome/common/ipc_message_macros.h"
 #include "webkit/glue/webcursor.h"
 
 //-----------------------------------------------------------------------------
 // PluginProcess messages
@@ skipping 63 matching lines @@
                               GURL /* url */,
                               std::string /* cookies */)
 
   // Get the list of proxies to use for |url|, as a semicolon delimited list
   // of "<TYPE> <HOST>:<PORT>" | "DIRECT".
   IPC_SYNC_MESSAGE_CONTROL1_2(PluginProcessHostMsg_ResolveProxy,
                               GURL /* url */,
                               int /* network error */,
                               std::string /* proxy list */)
 
+  // Creates a child window of the given parent window on the UI thread.
+  IPC_SYNC_MESSAGE_CONTROL1_1(PluginProcessHostMsg_CreateWindow,
+                              HWND /* parent */,
+                              HWND /* child */)
+
+  // Destroys the given window on the UI thread.
+  IPC_MESSAGE_CONTROL1(PluginProcessHostMsg_DestroyWindow,
+                              HWND /* window */)

[darin (slow to review), 2009/01/16 22:08:39]

nit: indentation

+
 IPC_END_MESSAGES(PluginProcessHost)
 
 
 //-----------------------------------------------------------------------------
 // Plugin messages
 // These are messages sent from the renderer process to the plugin process.
 IPC_BEGIN_MESSAGES(Plugin, 5)
   // Tells the plugin process to create a new plugin instance with the given
   // id.  A corresponding WebPluginDelegateStub is created which hosts the
   // WebPluginDelegateImpl.
@@ skipping 30 matching lines @@
                              int /* route_id */,
                              void* /* npobject_ptr */)
 
   IPC_SYNC_MESSAGE_ROUTED1_0(PluginMsg_DidFinishLoadWithReason,
                              int /* reason */)
 
   // Updates the plugin location.  For windowless plugins, windowless_buffer
   // contains a buffer that the plugin draws into.  background_buffer is used
   // for transparent windowless plugins, and holds the background of the plugin
   // rectangle.
-  IPC_MESSAGE_ROUTED6(PluginMsg_UpdateGeometry,
+  IPC_MESSAGE_ROUTED4(PluginMsg_UpdateGeometry,
                       gfx::Rect /* window_rect */,
                       gfx::Rect /* clip_rect */,
-                      std::vector<gfx::Rect> /* cutout_rects */,
-                      bool /* visible */,
                       base::SharedMemoryHandle /* windowless_buffer */,
                       base::SharedMemoryHandle /* background_buffer */)
 
   IPC_SYNC_MESSAGE_ROUTED0_0(PluginMsg_SetFocus)
 
   IPC_SYNC_MESSAGE_ROUTED1_2(PluginMsg_HandleEvent,
                              NPEvent /* event */,
                              bool /* handled */,
                              WebCursor /* cursor type*/)
 
@@ skipping 164 matching lines @@
                              std::string /* script */,
                              bool /* popups_allowed */,
                              NPVariant_Param /* result_param */,
                              bool /* result */)
 
   IPC_SYNC_MESSAGE_ROUTED1_0(NPObjectMsg_SetException,
                              std::string /* message */)
 
 IPC_END_MESSAGES(NPObject)