Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/core/html/canvas/CanvasFontCache.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/html/canvas/CanvasFontCache.h"
 
 #include "core/css/parser/CSSParser.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/dom/Document.h"
 #include "core/style/ComputedStyle.h"
 #include "platform/fonts/FontCache.h"
 #include "public/platform/Platform.h"
-#include "wtf/PtrUtil.h"
 
 namespace {
 
 const unsigned CanvasFontCacheMaxFonts = 50;
 const unsigned CanvasFontCacheHardMaxFonts = 250;
 const unsigned CanvasFontCacheHiddenMaxFonts = 1;
 const int defaultFontSize = 10;
 const char defaultFontFamily[] = "sans-serif";
 
 }
@@ skipping 104 matching lines @@
     m_mainCachePurgePreventer.reset();
     Platform::current()->currentThread()->removeTaskObserver(this);
     m_pruningScheduled = false;
 }
 
 void CanvasFontCache::schedulePruningIfNeeded()
 {
     if (m_pruningScheduled)
         return;
     ASSERT(!m_mainCachePurgePreventer);
-    m_mainCachePurgePreventer = wrapUnique(new FontCachePurgePreventer);
+    m_mainCachePurgePreventer = adoptPtr(new FontCachePurgePreventer);
     Platform::current()->currentThread()->addTaskObserver(this);
     m_pruningScheduled = true;
 }
 
 bool CanvasFontCache::isInCache(const String& fontString)
 {
     return m_fetchedFonts.find(fontString) != m_fetchedFonts.end();
 }
 
 void CanvasFontCache::pruneAll()
 {
     m_fetchedFonts.clear();
     m_fontLRUList.clear();
     m_fontsResolvedUsingDefaultStyle.clear();
 }
 
 DEFINE_TRACE(CanvasFontCache)
 {
     visitor->trace(m_fetchedFonts);
     visitor->trace(m_document);
 }
 
 } // namespace blink