Fix up some types in the API.

ppapi/proxy/ppb_core_proxy.cc

 // Copyright (c) 2011 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/ppb_core_proxy.h"
 
 #include <stdlib.h>  // For malloc
 
 #include "base/logging.h"
 #include "base/message_loop.h"
@@ skipping 18 matching lines @@
 }
 
 void AddRefResource(PP_Resource resource) {
   PluginResourceTracker::GetInstance()->AddRefResource(resource);
 }
 
 void ReleaseResource(PP_Resource resource) {
   PluginResourceTracker::GetInstance()->ReleaseResource(resource);
 }
 
-void* MemAlloc(size_t num_bytes) {
+void* MemAlloc(uint32_t num_bytes) {
   return malloc(num_bytes);
 }
 
 void MemFree(void* ptr) {
   free(ptr);
 }
 
 double GetTime() {
   return base::Time::Now().ToDoubleT();
 }
@@ skipping 72 matching lines @@
 void PPB_Core_Proxy::OnMsgAddRefResource(HostResource resource) {
   ppb_core_target()->AddRefResource(resource.host_resource());
 }
 
 void PPB_Core_Proxy::OnMsgReleaseResource(HostResource resource) {
   ppb_core_target()->ReleaseResource(resource.host_resource());
 }
 
 }  // namespace proxy
 }  // namespace pp