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

chrome/renderer/pepper/pepper_pdf_host.cc

 // Copyright (c) 2013 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_pdf_host.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/renderer/printing/print_web_view_helper.h"
 #include "content/public/common/referrer.h"
@@ skipping 94 matching lines @@
                              PP_Instance instance,
                              PP_Resource resource)
     : ppapi::host::ResourceHost(host->GetPpapiHost(), instance, resource),
       host_(host) {}
 
 PepperPDFHost::~PepperPDFHost() {}
 
 int32_t PepperPDFHost::OnResourceMessageReceived(
     const IPC::Message& msg,
     ppapi::host::HostMessageContext* context) {
-  IPC_BEGIN_MESSAGE_MAP(PepperPDFHost, msg)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_GetLocalizedString,
-                                    OnHostMsgGetLocalizedString)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_DidStartLoading,
-                                      OnHostMsgDidStartLoading)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_DidStopLoading,
-                                      OnHostMsgDidStopLoading)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_UserMetricsRecordAction,
-                                    OnHostMsgUserMetricsRecordAction)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_HasUnsupportedFeature,
-                                      OnHostMsgHasUnsupportedFeature)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_Print, OnHostMsgPrint)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_SaveAs, OnHostMsgSaveAs)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_GetResourceImage,
-                                    OnHostMsgGetResourceImage)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_SetSelectedText,
-                                    OnHostMsgSetSelectedText)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_SetLinkUnderCursor,
-                                    OnHostMsgSetLinkUnderCursor)
-  IPC_END_MESSAGE_MAP()
+  PPAPI_BEGIN_MESSAGE_MAP(PepperPDFHost, msg)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_GetLocalizedString,
+                                      OnHostMsgGetLocalizedString)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_DidStartLoading,
+                                        OnHostMsgDidStartLoading)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_DidStopLoading,
+                                        OnHostMsgDidStopLoading)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_UserMetricsRecordAction,
+                                      OnHostMsgUserMetricsRecordAction)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_HasUnsupportedFeature,
+                                        OnHostMsgHasUnsupportedFeature)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_Print, OnHostMsgPrint)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_SaveAs,
+                                        OnHostMsgSaveAs)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_GetResourceImage,
+                                      OnHostMsgGetResourceImage)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_SetSelectedText,
+                                      OnHostMsgSetSelectedText)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_SetLinkUnderCursor,
+                                      OnHostMsgSetLinkUnderCursor)
+  PPAPI_END_MESSAGE_MAP()
   return PP_ERROR_FAILED;
 }
 
 int32_t PepperPDFHost::OnHostMsgGetLocalizedString(
     ppapi::host::HostMessageContext* context,
     PP_ResourceString string_id) {
   std::string rv;
   if (string_id == PP_RESOURCESTRING_PDFGETPASSWORD) {
     rv = base::UTF16ToUTF8(l10n_util::GetStringUTF16(IDS_PDF_NEED_PASSWORD));
   } else if (string_id == PP_RESOURCESTRING_PDFLOADING) {
@@ skipping 242 matching lines @@
 
   const SkBitmap* bitmap = &skia::GetTopDevice(*canvas)->accessBitmap(false);
   pixels_to_write.copyPixelsTo(
       bitmap->getPixels(), bitmap->getSize(), bitmap->rowBytes());
 
   if (needs_unmapping)
     image_data->Unmap();
 
   return true;
 }