Replace uses of v8::Persistent with ScopedPersistent.

third_party/WebKit/Source/modules/webgl/WebGLObject.h

Index: third_party/WebKit/Source/modules/webgl/WebGLObject.h
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLObject.h b/third_party/WebKit/Source/modules/webgl/WebGLObject.h
index 2a8011327db1f103dcd9d0c0ef8eaf7a069684cd..6fe0442298e365e767876869325286932dc2abce 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLObject.h
+++ b/third_party/WebKit/Source/modules/webgl/WebGLObject.h
@@ -56,18 +56,6 @@ GLuint objectNonZero(const T* object)
     return result;
 }
 
-// TODO(kbr): v8::Persistent doesn't auto-reset in its destructor,
-// which wreaks havoc when they're embedded in Oilpan objects even if
-// they use GarbageCollectedFinalized. The first V8 GC after the
-// Oilpan object is reclaimed will reset the cell in the
-// v8::Persistent, scribbling over the Oilpan heap. If v8::Persistents
-// are ever embedded in Oilpan objects, they must use
-// CopyablePersistentTraits to pick up the kResetInDestructor = true
-// setting. This alias template ensures correct usage, but ideally,
-// these persistent caches would not be necessary. crbug.com/611864
-template <typename T>
-using V8CopyablePersistent = v8::Persistent<T, v8::CopyablePersistentTraits<T>>;
-
 class WebGLObject : public GarbageCollectedFinalized<WebGLObject>, public ScriptWrappable {
 public:
     virtual ~WebGLObject();