Pepper SRPC proxy style and type nits

ppapi/native_client/src/shared/ppapi_proxy/browser_ppp.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 "native_client/src/shared/ppapi_proxy/browser_ppp.h"
 
 #include <string.h>
 
 #include "native_client/src/include/nacl_scoped_ptr.h"
 #include "native_client/src/include/portability.h"
@@ skipping 40 matching lines @@
 // their pointers are available on upcall thread of the the trusted proxy.
 void PPBGetInterfaces() {
   PPBCoreInterface();
   // TODO(all): add more interfaces here once available off the main thread.
 }
 
 }  // namespace
 
 int32_t BrowserPpp::InitializeModule(PP_Module module_id,
                                      PPB_GetInterface get_browser_interface) {
-  DebugPrintf("PPP_InitializeModule: module=%"NACL_PRIu32"\n", module_id);
+  DebugPrintf("PPP_InitializeModule: module=%"NACL_PRId32"\n", module_id);
   // Ask the browser for an interface which provides missing functions
   const PPB_NaCl_Private* ppb_nacl = reinterpret_cast<const PPB_NaCl_Private*>(
       get_browser_interface(PPB_NACL_PRIVATE_INTERFACE));
   if (ppb_nacl == NULL) {
     DebugPrintf("PPP_InitializeModule: NaCl private interface missing!\n");
     return PP_ERROR_FAILED;
   }
   SetPPBGetInterface(get_browser_interface,
                      plugin_->enable_dev_interfaces(),
                      !ppb_nacl->Are3DInterfacesDisabled());
@@ skipping 142 matching lines @@
 
 const void* BrowserPpp::GetPluginInterfaceSafe(const char* interface_name) {
   const void* ppp_interface = GetPluginInterface(interface_name);
   if (ppp_interface == NULL)
     DebugPrintf("PPB_GetInterface: %s not found\n", interface_name);
   CHECK(ppp_interface != NULL);
   return ppp_interface;
 }
 
 }  // namespace ppapi_proxy