Remove TransformOperation::None

This patch removes the enum value TransformOperation::None, which is
currently only used in an ASSERT_NOT_REACHED case.

Review-Url: https://codereview.chromium.org/2616863002
Cr-Commit-Position: refs/heads/master@{#443092}

third_party/WebKit/Source/core/css/resolver/TransformBuilder.cpp

@@ -53,6 +53,8 @@ static Length convertToFloatLength(
 static TransformOperation::OperationType getTransformOperationType(
     CSSValueID type) {
   switch (type) {
+    default:
+      NOTREACHED();
     case CSSValueScale:
       return TransformOperation::Scale;
     case CSSValueScaleX:
@@ -95,10 +97,6 @@ static TransformOperation::OperationType getTransformOperationType(
       return TransformOperation::Matrix3D;
     case CSSValuePerspective:
       return TransformOperation::Perspective;
-    default:
-      ASSERT_NOT_REACHED();
-      // FIXME: We shouldn't have a type None since we never create them
-      return TransformOperation::None;
   }
 }
 

third_party/WebKit/Source/platform/animation/AnimationTranslationUtil.cpp

@@ -120,8 +120,8 @@ void toCompositorTransformOperations(
       case TransformOperation::Identity:
         outTransformOperations->appendIdentity();
         break;
-      case TransformOperation::None:
-        // Do nothing.
+      default:
+        NOTREACHED();
         break;
     }  // switch
   }    // for each operation

third_party/WebKit/Source/platform/transforms/TransformOperation.h

@@ -64,7 +64,6 @@ class PLATFORM_EXPORT TransformOperation
     Interpolated,
     Identity,
     RotateAroundOrigin,
-    None
   };
 
   TransformOperation() {}

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

@@ -283,16 +283,10 @@ bool TransformOperations::blendedBoundsForBox(const FloatBox& box,
         (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;
@@ -408,8 +402,6 @@ bool TransformOperations::blendedBoundsForBox(const FloatBox& box,
         }
       }
         continue;
-      case TransformOperation::None:
-        continue;
       case TransformOperation::Matrix:
       case TransformOperation::Matrix3D:
       case TransformOperation::Interpolated: