Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/web/tests/ImeOnFocusTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/Node.h"
 #include "core/html/HTMLElement.h"
 #include "platform/testing/URLTestHelpers.h"
 #include "platform/testing/UnitTestHelpers.h"
@@ skipping 50 matching lines @@
         Platform::current()->unitTestSupport()->unregisterAllMockedURLs();
     }
 
 protected:
     void sendGestureTap(WebView*, IntPoint);
     void focus(const AtomicString& element);
     void runImeOnFocusTest(std::string fileName, int, IntPoint tapPoint = IntPoint(-1, -1), const AtomicString& focusElement = nullAtom, std::string frame = "");
 
     std::string m_baseURL;
     FrameTestHelpers::WebViewHelper m_webViewHelper;
-    RefPtrWillBePersistent<Document> m_document;
+    Persistent<Document> m_document;
 };
 
 void ImeOnFocusTest::sendGestureTap(WebView* webView, IntPoint clientPoint)
 {
     WebGestureEvent webGestureEvent;
     webGestureEvent.type = WebInputEvent::GestureTap;
     // GestureTap is only ever from touch screens.
     webGestureEvent.sourceDevice = WebGestureDeviceTouchscreen;
     webGestureEvent.x = clientPoint.x();
     webGestureEvent.y = clientPoint.y();
@@ skipping 65 matching lines @@
 {
     runImeOnFocusTest("ime-on-focus-after-navigation-within-page.html", 1, IntPoint(50, 50), "input");
 }
 
 TEST_F(ImeOnFocusTest, AfterFrameLoadOnGesture)
 {
     runImeOnFocusTest("ime-on-focus-after-frame-load-on-gesture.html", 1, IntPoint(50, 50), "input", "frame.html");
 }
 
 } // namespace blink