Remove OwnPtr from Blink.

third_party/WebKit/Source/core/style/ContentData.cpp

Index: third_party/WebKit/Source/core/style/ContentData.cpp
diff --git a/third_party/WebKit/Source/core/style/ContentData.cpp b/third_party/WebKit/Source/core/style/ContentData.cpp
index 7689ff278ab225f3bbb31faa5a848b943626ab5f..6ea4e4d79ed70102020d0f3cd3d9fe713d1cb6d7 100644
--- a/third_party/WebKit/Source/core/style/ContentData.cpp
+++ b/third_party/WebKit/Source/core/style/ContentData.cpp
@@ -28,6 +28,7 @@
 #include "core/layout/LayoutQuote.h"
 #include "core/layout/LayoutTextFragment.h"
 #include "core/style/ComputedStyle.h"
+#include <memory>
 
 namespace blink {
 
@@ -41,7 +42,7 @@ ContentData* ContentData::create(const String& text)
     return new TextContentData(text);
 }
 
-ContentData* ContentData::create(PassOwnPtr<CounterContent> counter)
+ContentData* ContentData::create(std::unique_ptr<CounterContent> counter)
 {
     return new CounterContentData(std::move(counter));
 }