Add support for passing an arbitrary parameter to an IPC message handler. The motivation is for Web…

chrome/renderer/pepper/pepper_flash_renderer_host.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 "chrome/renderer/pepper/pepper_flash_renderer_host.h"
 
 #include <map>
 #include <vector>
 
 #include "base/lazy_instance.h"
@@ skipping 135 matching lines @@
   // This object may be destroyed in the middle of a sync message. If that is
   // the case, make sure we respond to all the pending navigate calls.
   std::vector<ppapi::host::ReplyMessageContext>::reverse_iterator it;
   for (it = navigate_replies_.rbegin(); it != navigate_replies_.rend(); ++it)
     SendReply(*it, IPC::Message());
 }
 
 int32_t PepperFlashRendererHost::OnResourceMessageReceived(
     const IPC::Message& msg,
     ppapi::host::HostMessageContext* context) {
-  IPC_BEGIN_MESSAGE_MAP(PepperFlashRendererHost, msg)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_GetProxyForURL,
-                                    OnGetProxyForURL);
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_SetInstanceAlwaysOnTop,
-                                    OnSetInstanceAlwaysOnTop);
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_DrawGlyphs,
-                                    OnDrawGlyphs);
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_Navigate, OnNavigate);
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_IsRectTopmost,
-                                    OnIsRectTopmost);
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_Flash_InvokePrinting,
-                                      OnInvokePrinting);
-  IPC_END_MESSAGE_MAP()
+  PPAPI_BEGIN_MESSAGE_MAP(PepperFlashRendererHost, msg)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_GetProxyForURL,
+                                      OnGetProxyForURL)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_SetInstanceAlwaysOnTop,
+                                      OnSetInstanceAlwaysOnTop)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_DrawGlyphs,
+                                      OnDrawGlyphs)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_Navigate, OnNavigate)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_Flash_IsRectTopmost,
+                                      OnIsRectTopmost)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_Flash_InvokePrinting,
+                                        OnInvokePrinting)
+  PPAPI_END_MESSAGE_MAP()
   return PP_ERROR_FAILED;
 }
 
 int32_t PepperFlashRendererHost::OnGetProxyForURL(
     ppapi::host::HostMessageContext* host_context,
     const std::string& url) {
   GURL gurl(url);
   if (!gurl.is_valid())
     return PP_ERROR_FAILED;
   std::string proxy;
@@ skipping 193 matching lines @@
           rect.point.x, rect.point.y, rect.size.width, rect.size.height)))
     return PP_OK;
   return PP_ERROR_FAILED;
 }
 
 int32_t PepperFlashRendererHost::OnInvokePrinting(
     ppapi::host::HostMessageContext* host_context) {
   PPB_PDF_Impl::InvokePrintingForInstance(pp_instance());
   return PP_OK;
 }