Update from https://crrev.com/320343

base/mac/scoped_mach_vm.h

 // 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.
 
 #ifndef BASE_MAC_SCOPED_MACH_VM_H_
 #define BASE_MAC_SCOPED_MACH_VM_H_
 
 #include <mach/mach.h>
 
 #include <algorithm>
@@ skipping 30 matching lines @@
 //     return false;
 //   }
 //   ScopedMachVM vm_owner(address, mach_vm_round_page(size));
 
 namespace base {
 namespace mac {
 
 class BASE_EXPORT ScopedMachVM {
  public:
   explicit ScopedMachVM(vm_address_t address = 0, vm_size_t size = 0)
-      : address_(address),
-        size_(size) {
-    DCHECK(address % PAGE_SIZE == 0);
-    DCHECK(size % PAGE_SIZE == 0);
+      : address_(address), size_(size) {
+    DCHECK_EQ(address % PAGE_SIZE, 0u);
+    DCHECK_EQ(size % PAGE_SIZE, 0u);
   }
 
   ~ScopedMachVM() {
     if (size_) {
       vm_deallocate(mach_task_self(), address_, size_);
     }
   }
 
   void reset(vm_address_t address = 0, vm_size_t size = 0);
 
@@ skipping 19 matching lines @@
   vm_address_t address_;
   vm_size_t size_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedMachVM);
 };
 
 }  // namespace mac
 }  // namespace base
 
 #endif  // BASE_MAC_SCOPED_MACH_VM_H_