Add GetPluginRefererURL to PPB_URLUtil_Dev interface to get the 'Referer' HTTP header value that wa…

ppapi/proxy/ppb_instance_proxy.cc

Index: ppapi/proxy/ppb_instance_proxy.cc
===================================================================
--- ppapi/proxy/ppb_instance_proxy.cc	(revision 219784)
+++ ppapi/proxy/ppb_instance_proxy.cc	(working copy)
@@ -173,6 +173,8 @@
                         OnHostMsgDocumentCanAccessDocument)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetPluginInstanceURL,
                         OnHostMsgGetPluginInstanceURL)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetPluginRefererURL,
+                        OnHostMsgGetPluginRefererURL)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_NeedKey,
                         OnHostMsgNeedKey)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_KeyAdded,
@@ -526,6 +528,17 @@
       components);
 }
 
+PP_Var PPB_Instance_Proxy::GetPluginRefererURL(
+      PP_Instance instance,
+      PP_URLComponents_Dev* components) {
+  ReceiveSerializedVarReturnValue result;
+  dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetPluginRefererURL(
+      API_ID_PPB_INSTANCE, instance, &result));
+  return PPB_URLUtil_Shared::ConvertComponentsAndReturnURL(
+      result.Return(dispatcher()),
+      components);
+}
+
 void PPB_Instance_Proxy::NeedKey(PP_Instance instance,
                                  PP_Var key_system,
                                  PP_Var session_id,
@@ -1032,6 +1045,18 @@
   }
 }
 
+void PPB_Instance_Proxy::OnHostMsgGetPluginRefererURL(
+    PP_Instance instance,
+    SerializedVarReturnValue result) {
+  if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
+    return;
+  EnterInstanceNoLock enter(instance);
+  if (enter.succeeded()) {
+    result.Return(dispatcher(),
+                  enter.functions()->GetPluginRefererURL(instance, NULL));
+  }
+}
+
 void PPB_Instance_Proxy::OnHostMsgNeedKey(PP_Instance instance,
                                           SerializedVarReceiveInput key_system,
                                           SerializedVarReceiveInput session_id,