Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/animation/CompositorAnimationsTest.cpp

Index: third_party/WebKit/Source/core/animation/CompositorAnimationsTest.cpp
diff --git a/third_party/WebKit/Source/core/animation/CompositorAnimationsTest.cpp b/third_party/WebKit/Source/core/animation/CompositorAnimationsTest.cpp
index 8e99446dee9e8ad1b9c2214f17fc9ed79f334952..82c47d80bfb9bde537f7d1e2389da4c34bb7221e 100644
--- a/third_party/WebKit/Source/core/animation/CompositorAnimationsTest.cpp
+++ b/third_party/WebKit/Source/core/animation/CompositorAnimationsTest.cpp
@@ -79,8 +79,8 @@ protected:
     OwnPtr<AnimatableValueKeyframeVector> m_keyframeVector5;
     Persistent<AnimatableValueKeyframeEffectModel> m_keyframeAnimationEffect5;
 
-    RefPtrWillBePersistent<Document> m_document;
-    RefPtrWillBePersistent<Element> m_element;
+    Persistent<Document> m_document;
+    Persistent<Element> m_element;
     Persistent<AnimationTimeline> m_timeline;
     OwnPtr<DummyPageHolder> m_pageHolder;
     WebCompositorSupportMock m_mockCompositor;
@@ -1177,7 +1177,7 @@ TEST_F(AnimationCompositorAnimationsTest, createSimpleOpacityAnimationWithTiming
 
 TEST_F(AnimationCompositorAnimationsTest, CancelIncompatibleCompositorAnimations)
 {
-    RefPtrWillBePersistent<Element> element = m_document->createElement("shared", ASSERT_NO_EXCEPTION);
+    Persistent<Element> element = m_document->createElement("shared", ASSERT_NO_EXCEPTION);
 
     LayoutObjectProxy* layoutObject = LayoutObjectProxy::create(element.get());
     element->setLayoutObject(layoutObject);