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

Source/core/animation/LengthPairStyleInterpolationTest.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 "config.h"
 #include "core/animation/LengthPairStyleInterpolation.h"
 
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/CSSValue.h"
 #include "core/css/Pair.h"
 #include "core/css/StylePropertySet.h"
 
 #include <gtest/gtest.h>
 
 namespace blink {
 
 class LengthPairStyleInterpolationTest : public ::testing::Test {
 
 protected:
-    static PassOwnPtrWillBeRawPtr<InterpolableValue> lengthPairToInterpolableValue(const CSSValue& value)
+    static InterpolableValue* lengthPairToInterpolableValue(const CSSValue& value)
     {
         return LengthPairStyleInterpolation::lengthPairToInterpolableValue(value);
     }
 
     static PassRefPtrWillBeRawPtr<CSSValue> interpolableValueToLengthPair(InterpolableValue* value, InterpolationRange range)
     {
         return LengthPairStyleInterpolation::interpolableValueToLengthPair(value, range);
     }
 
     static PassRefPtrWillBeRawPtr<CSSValue> roundTrip(PassRefPtrWillBeRawPtr<CSSValue> value, InterpolationRange range)
     {
-        return interpolableValueToLengthPair(lengthPairToInterpolableValue(*value).get(), range);
+        return interpolableValueToLengthPair(lengthPairToInterpolableValue(*value), range);
     }
 
     static void testPrimitiveValue(RefPtrWillBeRawPtr<CSSValue> value, double first, double second, CSSPrimitiveValue::UnitType unitType)
     {
         EXPECT_TRUE(value->isPrimitiveValue());
 
         Pair* pair = toCSSPrimitiveValue(value.get())->getPairValue();
         ASSERT_TRUE(pair);
 
         EXPECT_EQ(pair->first()->getDoubleValue(), first);
@@ skipping 40 matching lines @@
     testPrimitiveValue(value5, 10, 20, CSSPrimitiveValue::UnitType::Pixels);
 
     RefPtrWillBeRawPtr<CSSPrimitiveValue> firstPc = CSSPrimitiveValue::create(30, CSSPrimitiveValue::UnitType::Percentage);
     RefPtrWillBeRawPtr<CSSPrimitiveValue> secondPc = CSSPrimitiveValue::create(-30, CSSPrimitiveValue::UnitType::Percentage);
     RefPtrWillBeRawPtr<Pair> pairPc = Pair::create(firstPc, secondPc, Pair::KeepIdenticalValues);
     RefPtrWillBeRawPtr<CSSValue> value6 = roundTrip(CSSPrimitiveValue::create(pairPc.release()), RangeNonNegative);
     testPrimitiveValue(value6, 30, 0, CSSPrimitiveValue::UnitType::Percentage);
 }
 
 }