Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/bindings/core/v8/ReadableStreamOperationsTest.cpp

 // Copyright 2015 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 "bindings/core/v8/ReadableStreamOperations.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptFunction.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/ScriptValue.h"
@@ skipping 138 matching lines @@
         ScriptValue r = eval(s);
         if (block.HasCaught()) {
             ADD_FAILURE() << toCoreString(block.Exception()->ToString(isolate())).utf8().data();
             block.ReThrow();
         }
         return r;
     }
 
     V8TestingScope m_scope;
     v8::TryCatch m_block;
-    RefPtrWillBePersistent<Document> m_document;
+    Persistent<Document> m_document;
 };
 
 TEST_F(ReadableStreamOperationsTest, IsReadableStream)
 {
     EXPECT_FALSE(ReadableStreamOperations::isReadableStream(scriptState(), ScriptValue(scriptState(), v8::Undefined(isolate()))));
     EXPECT_FALSE(ReadableStreamOperations::isReadableStream(scriptState(), ScriptValue::createNull(scriptState())));
     EXPECT_FALSE(ReadableStreamOperations::isReadableStream(scriptState(), ScriptValue(scriptState(), v8::Object::New(isolate()))));
     ScriptValue stream = evalWithPrintingError("new ReadableStream()");
     EXPECT_FALSE(stream.isEmpty());
     EXPECT_TRUE(ReadableStreamOperations::isReadableStream(scriptState(), stream));
@@ skipping 87 matching lines @@
     EXPECT_EQ("hello", it1->value());
     EXPECT_TRUE(it2->isSet());
     EXPECT_TRUE(it2->isValid());
     EXPECT_TRUE(it2->isDone());
 }
 
 } // namespace
 
 } // namespace blink