Rename all existing custom element classes as V0

third_party/WebKit/Source/core/dom/custom/V0CustomElementObserver.h

Index: third_party/WebKit/Source/core/dom/custom/V0CustomElementObserver.h
diff --git a/third_party/WebKit/Source/core/dom/custom/CustomElementObserver.h b/third_party/WebKit/Source/core/dom/custom/V0CustomElementObserver.h
similarity index 88%
rename from third_party/WebKit/Source/core/dom/custom/CustomElementObserver.h
rename to third_party/WebKit/Source/core/dom/custom/V0CustomElementObserver.h
index b27c9293ea693d69ff7352707fd6ada2b30747ba..130c4c818c776aea7e2bf7e0606bd8d24712bd8f 100644
--- a/third_party/WebKit/Source/core/dom/custom/CustomElementObserver.h
+++ b/third_party/WebKit/Source/core/dom/custom/V0CustomElementObserver.h
@@ -28,8 +28,8 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef CustomElementObserver_h
-#define CustomElementObserver_h
+#ifndef V0CustomElementObserver_h
+#define V0CustomElementObserver_h
 
 #include "platform/heap/Handle.h"
 #include "wtf/HashMap.h"
@@ -38,9 +38,9 @@ namespace blink {
 
 class Element;
 
-class CustomElementObserver : public GarbageCollectedFinalized<CustomElementObserver> {
+class V0CustomElementObserver : public GarbageCollectedFinalized<V0CustomElementObserver> {
 public:
-    virtual ~CustomElementObserver() { }
+    virtual ~V0CustomElementObserver() { }
 
     // API for CustomElement to kick off notifications
     static void notifyElementWasDestroyed(Element*);
@@ -48,7 +48,7 @@ public:
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 
 protected:
-    CustomElementObserver() { }
+    V0CustomElementObserver() { }
 
     void observe(Element*);
     void unobserve(Element*);
@@ -58,4 +58,4 @@ protected:
 
 } // namespace blink
 
-#endif // CustomElementObserver_h
+#endif // V0CustomElementObserver_h