Remove InterpolableBool and existing use of it in SVG path interpolation

third_party/WebKit/Source/core/animation/InterpolableValue.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/animation/InterpolableValue.h"
 
 #include <memory>
 
 namespace blink {
 
@@ skipping 20 matching lines @@
 
   if (progress == 0 || m_value == toNumber.m_value)
     resultNumber.m_value = m_value;
   else if (progress == 1)
     resultNumber.m_value = toNumber.m_value;
   else
     resultNumber.m_value =
         m_value * (1 - progress) + toNumber.m_value * progress;
 }
 
-void InterpolableBool::interpolate(const InterpolableValue& to,
-                                   const double progress,
-                                   InterpolableValue& result) const {
-  const InterpolableBool& toBool = toInterpolableBool(to);
-  InterpolableBool& resultBool = toInterpolableBool(result);
-
-  if (progress < 0.5)
-    resultBool.m_value = m_value;
-  else
-    resultBool.m_value = toBool.m_value;
-}
-
 void InterpolableList::interpolate(const InterpolableValue& to,
                                    const double progress,
                                    InterpolableValue& result) const {
   const InterpolableList& toList = toInterpolableList(to);
   InterpolableList& resultList = toInterpolableList(result);
 
   DCHECK_EQ(toList.length(), length());
   DCHECK_EQ(resultList.length(), length());
 
   for (size_t i = 0; i < length(); i++) {
@@ skipping 42 matching lines @@
       toInterpolableAnimatableValue(result);
   if (progress == 0)
     resultValue.m_value = m_value;
   if (progress == 1)
     resultValue.m_value = toValue.m_value;
   resultValue.m_value = AnimatableValue::interpolate(
       m_value.get(), toValue.m_value.get(), progress);
 }
 
 }  // namespace blink