Fix silent truncations when extracting values from CheckedNumeric

content/child/font_warmup_win.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 "content/child/font_warmup_win.h"
 
 #include <dwrite.h>
 #include <stdint.h>
 #include <map>
 
@@ skipping 132 matching lines @@
         return handle_entry->second;
       }
     }
     return nullptr;
   }
 
   scoped_refptr<FakeGdiObject> Create(uint32_t magic) {
     base::AutoLock scoped_lock(objects_lock_);
     curr_handle_++;
     // We don't support wrapping the fake handle value.
-    void* handle = reinterpret_cast<void*>(curr_handle_.ValueOrDie());
+    void* handle = reinterpret_cast<void*>(
+        static_cast<uintptr_t>(curr_handle_.ValueOrDie()));
     scoped_refptr<FakeGdiObject> object(new FakeGdiObject(magic, handle));
     objects_[handle] = object;
     return object;
   }
 
   bool DeleteObject(void* obj, uint32_t magic) {
     base::AutoLock scoped_lock(objects_lock_);
     auto handle_entry = objects_.find(obj);
     if (handle_entry != objects_.end() &&
         handle_entry->second->magic() == magic) {
@@ skipping 262 matching lines @@
 
 void ResetEmulatedGdiHandlesForTesting() {
   g_fake_gdi_object_factory.Get().ResetObjectHandles();
 }
 
 void SetPreSandboxWarmupFontMgrForTesting(SkFontMgr* fontmgr) {
   g_warmup_fontmgr = fontmgr;
 }
 
 }  // namespace content