Revert of Add operator<< to StyleDifference for debug logging.

third_party/WebKit/Source/core/style/StyleDifference.cpp

Index: third_party/WebKit/Source/core/style/StyleDifference.cpp
diff --git a/third_party/WebKit/Source/core/style/StyleDifference.cpp b/third_party/WebKit/Source/core/style/StyleDifference.cpp
deleted file mode 100644
index ec4d70e7044c1970c6e966331b250a4a0970b09d..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/style/StyleDifference.cpp
+++ /dev/null
@@ -1,88 +0,0 @@
-// Copyright 2017 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/style/StyleDifference.h"
-
-namespace blink {
-
-std::ostream& operator<<(std::ostream& out, const StyleDifference& diff) {
-  out << "StyleDifference{layoutType=";
-
-  switch (diff.m_layoutType) {
-    case StyleDifference::NoLayout:
-      out << "NoLayout";
-      break;
-    case StyleDifference::PositionedMovement:
-      out << "PositionedMovement";
-      break;
-    case StyleDifference::FullLayout:
-      out << "FullLayout";
-      break;
-    default:
-      NOTREACHED();
-      break;
-  }
-
-  out << ", paintInvalidationType=";
-  switch (diff.m_paintInvalidationType) {
-    case StyleDifference::NoPaintInvalidation:
-      out << "NoPaintInvalidation";
-      break;
-    case StyleDifference::PaintInvalidationObject:
-      out << "PaintInvalidationObject";
-      break;
-    case StyleDifference::PaintInvalidationSubtree:
-      out << "PaintInvalidationSubtree";
-      break;
-    default:
-      NOTREACHED();
-      break;
-  }
-
-  out << ", recomputeOverflow=" << diff.m_recomputeOverflow;
-  out << ", visualRectUpdate=" << diff.m_visualRectUpdate;
-
-  out << ", propertySpecificDifferences=";
-  int diffCount = 0;
-  for (int i = 0; i < StyleDifference::PropertyDifferenceMax; i++) {
-    unsigned bitTest = 1 << i;
-    if (diff.m_propertySpecificDifferences & bitTest) {
-      if (diffCount++ > 0)
-        out << "|";
-      switch (bitTest) {
-        case StyleDifference::TransformChanged:
-          out << "TransformChanged";
-          break;
-        case StyleDifference::OpacityChanged:
-          out << "OpacityChanged";
-          break;
-        case StyleDifference::ZIndexChanged:
-          out << "ZIndexChanged";
-          break;
-        case StyleDifference::FilterChanged:
-          out << "FilterChanged";
-          break;
-        case StyleDifference::BackdropFilterChanged:
-          out << "BackdropFilterChanged";
-          break;
-        case StyleDifference::CSSClipChanged:
-          out << "CSSClipChanged";
-          break;
-        case StyleDifference::TextDecorationOrColorChanged:
-          out << "TextDecorationOrColorChanged";
-          break;
-        case StyleDifference::ScrollAnchorDisablingPropertyChanged:
-          out << "ScrollAnchorDisablingPropertyChanged";
-          break;
-        default:
-          NOTREACHED();
-          break;
-      }
-    }
-  }
-
-  return out << "}";
-}
-
-}  // namespace blink