Module size is uint32_t on Windows.

chrome/browser/install_verification/win/module_info.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_INSTALL_VERIFICATION_WIN_MODULE_INFO_H_
 #define CHROME_BROWSER_INSTALL_VERIFICATION_WIN_MODULE_INFO_H_
 
 #include "base/strings/string16.h"
 
 // Represents and facilitates operations on the address range corresponding to a
 // loaded module.
 struct ModuleInfo {
   ModuleInfo() : base_address(0), size(0) {
   }
 
   ModuleInfo(const base::char16* const module_name,
              uintptr_t module_base_address,
-             size_t module_size)
+             uint32_t module_size)
       : base_address(module_base_address),
         size(module_size),
         name(module_name) {
   }
 
   // Sorts modules by their base address.
   bool operator< (const ModuleInfo& compare) const {
     return base_address < compare.base_address;
   }
 
   // Identifies if an address is within a module.
   bool ContainsAddress(uintptr_t address) const {
     return address >= base_address && address < base_address + size;
   }
 
   base::string16 name;
-  uintptr_t  base_address;
-  size_t size;
+  uintptr_t base_address;
+  uint32_t size;
 };
 
 #endif  // CHROME_BROWSER_INSTALL_VERIFICATION_WIN_MODULE_INFO_H_