Rename DisplayItem::Type enum constants to Chromium style.

third_party/WebKit/Source/platform/graphics/paint/DisplayItemTest.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 "platform/graphics/paint/DisplayItem.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 namespace {
 
 #ifndef NDEBUG
 TEST(DisplayItemTest, DebugStringsExist)
 {
-    for (int type = 0; type <= DisplayItem::TypeLast; type++) {
+    for (int type = 0; type <= DisplayItem::kTypeLast; type++) {
         String debugString = DisplayItem::typeAsDebugString(static_cast<DisplayItem::Type>(type));
         EXPECT_FALSE(debugString.isEmpty());
         EXPECT_NE("Unknown", debugString);
     }
 }
 #endif // NDEBUG
 
 } // namespace
 } // namespace blink