Move MediaQuery classes off BlinkGC heap

third_party/WebKit/Source/core/css/MediaQuery.h

Index: third_party/WebKit/Source/core/css/MediaQuery.h
diff --git a/third_party/WebKit/Source/core/css/MediaQuery.h b/third_party/WebKit/Source/core/css/MediaQuery.h
index 9be5c34c88c3b0a728d4b3049660c8a59d61c260..e0a179a414bc237e9721b01ad5ac8b963b269259 100644
--- a/third_party/WebKit/Source/core/css/MediaQuery.h
+++ b/third_party/WebKit/Source/core/css/MediaQuery.h
@@ -39,16 +39,16 @@
 namespace blink {
 class MediaQueryExp;
 
-using ExpressionHeapVector = HeapVector<Member<MediaQueryExp>>;
+using ExpressionHeapVector = Vector<MediaQueryExp>;
 
-class CORE_EXPORT MediaQuery : public GarbageCollectedFinalized<MediaQuery> {
+class CORE_EXPORT MediaQuery {
  public:
   enum RestrictorType { kOnly, kNot, kNone };
 
-  static MediaQuery* Create(RestrictorType,
-                            String media_type,
-                            ExpressionHeapVector);
-  static MediaQuery* CreateNotAll();
+  static std::unique_ptr<MediaQuery> Create(RestrictorType,
+                                            String media_type,
+                                            ExpressionHeapVector);
+  static std::unique_ptr<MediaQuery> CreateNotAll();
 
   ~MediaQuery();
 
@@ -58,9 +58,9 @@ class CORE_EXPORT MediaQuery : public GarbageCollectedFinalized<MediaQuery> {
   bool operator==(const MediaQuery& other) const;
   String CssText() const;
 
-  MediaQuery* Copy() const { return new MediaQuery(*this); }
-
-  DECLARE_TRACE();
+  std::unique_ptr<MediaQuery> Copy() const {
+    return WTF::WrapUnique(new MediaQuery(*this));
+  }
 
  private:
   MediaQuery(RestrictorType, String media_type, ExpressionHeapVector);