Avoid WTF::Vector::at() and operator[] in core/dom.

third_party/WebKit/Source/core/dom/CompositorProxy.cpp

 // Copyright 2015 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 "core/dom/CompositorProxy.h"
 
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/DOMNodeIds.h"
 #include "core/dom/ExceptionCode.h"
@@ skipping 80 matching lines @@
   for (const auto& attribute : attributeArray) {
     properties |= compositorMutablePropertyForName(attribute);
   }
   return properties;
 }
 
 #if DCHECK_IS_ON()
 static bool sanityCheckMutableProperties(uint32_t properties) {
   // Ensures that we only have bits set for valid mutable properties.
   uint32_t sanityCheckProperties = properties;
-  for (unsigned i = 0; i < WTF_ARRAY_LENGTH(allowedProperties); ++i) {
-    sanityCheckProperties &=
-        ~static_cast<uint32_t>(allowedProperties[i].property);
-  }
+  for (const auto& property : allowedProperties)
+    sanityCheckProperties &= ~static_cast<uint32_t>(property.property);
   return !sanityCheckProperties;
 }
 #endif
 
 CompositorProxy* CompositorProxy::create(ExecutionContext* context,
                                          Element* element,
                                          const Vector<String>& attributeArray,
                                          ExceptionState& exceptionState) {
   if (!context->isDocument()) {
     exceptionState.throwTypeError(ExceptionMessages::failedToConstruct(
@@ skipping 184 matching lines @@
         m_elementId, m_compositorMutableProperties);
   } else {
     Platform::current()->mainThread()->getWebTaskRunner()->postTask(
         BLINK_FROM_HERE,
         crossThreadBind(&decrementCompositorProxiedPropertiesForElement,
                         m_elementId, m_compositorMutableProperties));
   }
 }
 
 }  // namespace blink