Do PPB_FileIO Query and Read in the plugin process.

content/renderer/pepper/pepper_file_io_host.h

Index: content/renderer/pepper/pepper_file_io_host.h
diff --git a/content/renderer/pepper/pepper_file_io_host.h b/content/renderer/pepper/pepper_file_io_host.h
index 88596feaa82765b795fd702efdd49b8afeb28670..c8ecd385e8eeca15a0881e8a52e92340ced708c6 100644
--- a/content/renderer/pepper/pepper_file_io_host.h
+++ b/content/renderer/pepper/pepper_file_io_host.h
@@ -45,13 +45,9 @@ class PepperFileIOHost : public ppapi::host::ResourceHost,
   int32_t OnHostMsgOpen(ppapi::host::HostMessageContext* context,
                         PP_Resource file_ref_resource,
                         int32_t open_flags);
-  int32_t OnHostMsgQuery(ppapi::host::HostMessageContext* context);
   int32_t OnHostMsgTouch(ppapi::host::HostMessageContext* context,
                          PP_Time last_access_time,
                          PP_Time last_modified_time);
-  int32_t OnHostMsgRead(ppapi::host::HostMessageContext* context,
-                        int64_t offset,
-                        int32_t bytes_to_read);
   int32_t OnHostMsgWrite(ppapi::host::HostMessageContext* context,
                          int64_t offset,
                          const std::string& buffer);
@@ -96,6 +92,8 @@ class PepperFileIOHost : public ppapi::host::ResourceHost,
                                     base::PlatformFileError error_code,
                                     int bytes_written);
 
+  RendererPpapiHost* renderer_ppapi_host_;
+
   base::PlatformFile file_;
 
   // The file system type specified in the Open() call. This will be