Remove TransformOperation::None

third_party/WebKit/Source/platform/transforms/TransformOperations.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 264 matching lines @@
   int fromSize = from.operations().size();
   int toSize = operations().size();
   int size = std::max(fromSize, toSize);
 
   *bounds = box;
   for (int i = size - 1; i >= 0; i--) {
     RefPtr<TransformOperation> fromOperation =
         (i < fromSize) ? from.operations()[i] : nullptr;
     RefPtr<TransformOperation> toOperation =
         (i < toSize) ? operations()[i] : nullptr;
-    if (fromOperation && fromOperation->type() == TransformOperation::None)
-      fromOperation = nullptr;
 
-    if (toOperation && toOperation->type() == TransformOperation::None)
-      toOperation = nullptr;
-
+    DCHECK(fromOperation || toOperation);
     TransformOperation::OperationType interpolationType =
-        toOperation
-            ? toOperation->type()
-            : fromOperation ? fromOperation->type() : TransformOperation::None;
+        toOperation ? toOperation->type() : fromOperation->type();
     if (fromOperation && toOperation &&
         !fromOperation->canBlendWith(*toOperation.get()))
       return false;
 
     switch (interpolationType) {
       case TransformOperation::Identity:
         bounds->expandTo(box);
         continue;
       case TransformOperation::Translate:
       case TransformOperation::TranslateX:
@@ skipping 95 matching lines @@
                 *bounds = boundsForArc;
                 first = false;
               } else {
                 bounds->expandTo(boundsForArc);
               }
             }
           }
         }
       }
         continue;
-      case TransformOperation::None:
-        continue;
       case TransformOperation::Matrix:
       case TransformOperation::Matrix3D:
       case TransformOperation::Interpolated:
       case TransformOperation::RotateAroundOrigin:
         return false;
     }
   }
 
   return true;
 }
 
 TransformOperations TransformOperations::add(
     const TransformOperations& addend) const {
   TransformOperations result;
   result.m_operations = operations();
   result.m_operations.appendVector(addend.operations());
   return result;
 }
 
 TransformOperations TransformOperations::zoom(double factor) const {
   TransformOperations result;
   for (auto& transformOperation : m_operations)
     result.m_operations.append(transformOperation->zoom(factor));
   return result;
 }
 
 }  // namespace blink