Add private PPAPI interfaces for PDFium accessibility.

ppapi/proxy/ppp_pdf_proxy.cc

 // Copyright 2014 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 "ppapi/proxy/ppp_pdf_proxy.h"
 
 #include "build/build_config.h"
 #include "ppapi/proxy/host_dispatcher.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/proxy_lock.h"
@@ skipping 18 matching lines @@
 PP_Bool GetPrintPresetOptionsFromDocument(
     PP_Instance instance,
     PP_PdfPrintPresetOptions_Dev* options) {
   PP_Bool ret = PP_FALSE;
   HostDispatcher::GetForInstance(instance)
       ->Send(new PpapiMsg_PPPPdf_PrintPresetOptions(
           API_ID_PPP_PDF, instance, options, &ret));
   return ret;
 }
 
+void EnableAccessibility(PP_Instance instance) {
+  HostDispatcher::GetForInstance(instance)->Send(
+      new PpapiMsg_PPPPdf_EnableAccessibility(API_ID_PPP_PDF, instance));
+}
+
 const PPP_Pdf ppp_pdf_interface = {
   &GetLinkAtPosition,
   &Transform,
-  &GetPrintPresetOptionsFromDocument
+  &GetPrintPresetOptionsFromDocument,
+  &EnableAccessibility,
 };
 #else
 // The NaCl plugin doesn't need the host side interface - stub it out.
 const PPP_Pdf ppp_pdf_interface = {};
 #endif
 
 }  // namespace
 
 PPP_Pdf_Proxy::PPP_Pdf_Proxy(Dispatcher* dispatcher)
     : InterfaceProxy(dispatcher),
@@ skipping 14 matching lines @@
 
 bool PPP_Pdf_Proxy::OnMessageReceived(const IPC::Message& msg) {
   if (!dispatcher()->IsPlugin())
     return false;
 
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PPP_Pdf_Proxy, msg)
     IPC_MESSAGE_HANDLER(PpapiMsg_PPPPdf_Rotate, OnPluginMsgRotate)
     IPC_MESSAGE_HANDLER(PpapiMsg_PPPPdf_PrintPresetOptions,
                         OnPluginMsgPrintPresetOptions)
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPPPdf_EnableAccessibility,
+                        OnPluginMsgEnableAccessibility)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void PPP_Pdf_Proxy::OnPluginMsgRotate(PP_Instance instance, bool clockwise) {
   PP_PrivatePageTransformType type = clockwise ?
       PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CW :
       PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CCW;
   if (ppp_pdf_)
     CallWhileUnlocked(ppp_pdf_->Transform, instance, type);
 }
 
 void PPP_Pdf_Proxy::OnPluginMsgPrintPresetOptions(
     PP_Instance instance,
     PP_PdfPrintPresetOptions_Dev* options,
     PP_Bool* result) {
   if (ppp_pdf_) {
     *result = CallWhileUnlocked(
         ppp_pdf_->GetPrintPresetOptionsFromDocument, instance, options);
   }
 }
 
+void PPP_Pdf_Proxy::OnPluginMsgEnableAccessibility(PP_Instance instance) {
+  if (ppp_pdf_)
+    CallWhileUnlocked(ppp_pdf_->EnableAccessibility, instance);
+}
+
 }  // namespace proxy
 }  // namespace ppapi