[Oilpan] Migrate most classes under core/animations to Oilpan heap.

Source/core/animation/animatable/AnimatableValueTestHelperTest.cpp

 /*
  * Copyright (c) 2013, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 31 matching lines @@
 #include <sstream>
 #include <string>
 
 
 using namespace blink;
 
 namespace {
 
 class AnimationAnimatableValueTestHelperTest : public ::testing::Test {
 protected:
-    ::std::string PrintToString(PassRefPtrWillBeRawPtr<AnimatableValue> animValue)
+    ::std::string PrintToString(AnimatableValue* animValue)
     {
-        return ::testing::PrintToString(*animValue.get());
+        return ::testing::PrintToString(*animValue);
     }
 };
 
 TEST_F(AnimationAnimatableValueTestHelperTest, PrintTo)
 {
     EXPECT_THAT(
         PrintToString(AnimatableClipPathOperation::create(ShapeClipPathOperation::create(BasicShapeCircle::create().get()).get())),
         testing::StartsWith("AnimatableClipPathOperation")
         );
 
@@ skipping 31 matching lines @@
     EXPECT_EQ(
         ::std::string("AnimatableUnknown(none)"),
         PrintToString(AnimatableUnknown::create(CSSPrimitiveValue::createIdentifier(CSSValueNone).get())));
 
     EXPECT_EQ(
         ::std::string("AnimatableVisibility(VISIBLE)"),
         PrintToString(AnimatableVisibility::create(VISIBLE)));
 }
 
 } // namespace