Add compile time checks against longs being used in IPC structs on 32 bit Android.

extensions/common/extension_messages.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 "extensions/common/extension_messages.h"
 
 #include <stddef.h>
 
 #include "content/public/common/common_param_traits.h"
 #include "extensions/common/extension.h"
@@ skipping 169 matching lines @@
 
 void ParamTraits<APIPermission::ID>::Log(
     const param_type& p, std::string* l) {
   LogParam(static_cast<int>(p), l);
 }
 
 void ParamTraits<APIPermissionSet>::Write(
     Message* m, const param_type& p) {
   APIPermissionSet::const_iterator it = p.begin();
   const APIPermissionSet::const_iterator end = p.end();
-  WriteParam(m, p.size());
+  WriteParam(m, static_cast<uint32_t>(p.size()));
   for (; it != end; ++it) {
     WriteParam(m, it->id());
     it->Write(m);
   }
 }
 
 bool ParamTraits<APIPermissionSet>::Read(const Message* m,
                                          base::PickleIterator* iter,
                                          param_type* r) {
-  size_t size;
+  uint32_t size;
   if (!ReadParam(m, iter, &size))
     return false;
   for (size_t i = 0; i < size; ++i) {
     APIPermission::ID id;
     if (!ReadParam(m, iter, &id))
       return false;
     const APIPermissionInfo* permission_info =
       extensions::PermissionsInfo::GetInstance()->GetByID(id);
     if (!permission_info)
       return false;
     scoped_ptr<APIPermission> p(permission_info->CreateAPIPermission());
     if (!p->Read(m, iter))
       return false;
     r->insert(p.release());
   }
   return true;
 }
 
 void ParamTraits<APIPermissionSet>::Log(
     const param_type& p, std::string* l) {
   LogParam(p.map(), l);
 }
 
 void ParamTraits<ManifestPermissionSet>::Write(
     Message* m, const param_type& p) {
   ManifestPermissionSet::const_iterator it = p.begin();
   const ManifestPermissionSet::const_iterator end = p.end();
-  WriteParam(m, p.size());
+  WriteParam(m, static_cast<uint32_t>(p.size()));
   for (; it != end; ++it) {
     WriteParam(m, it->name());
     it->Write(m);
   }
 }
 
 bool ParamTraits<ManifestPermissionSet>::Read(const Message* m,
                                               base::PickleIterator* iter,
                                               param_type* r) {
-  size_t size;
+  uint32_t size;
   if (!ReadParam(m, iter, &size))
     return false;
   for (size_t i = 0; i < size; ++i) {
     std::string name;
     if (!ReadParam(m, iter, &name))
       return false;
     scoped_ptr<ManifestPermission> p(ManifestHandler::CreatePermission(name));
     if (!p)
       return false;
     if (!p->Read(m, iter))
@@ skipping 79 matching lines @@
          ReadParam(m, iter, &p->active_permissions) &&
          ReadParam(m, iter, &p->withheld_permissions);
 }
 
 void ParamTraits<ExtensionMsg_Loaded_Params>::Log(const param_type& p,
                                                   std::string* l) {
   l->append(p.id);
 }
 
 }  // namespace IPC