Fewer reused duplicate symbol names in animation.

third_party/WebKit/Source/core/animation/FontWeightConversion.cpp

Index: third_party/WebKit/Source/core/animation/FontWeightConversion.cpp
diff --git a/third_party/WebKit/Source/core/animation/FontWeightConversion.cpp b/third_party/WebKit/Source/core/animation/FontWeightConversion.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a8a5354b26e2b95048a02aeeb8d3f9362f9f0b51
--- /dev/null
+++ b/third_party/WebKit/Source/core/animation/FontWeightConversion.cpp
@@ -0,0 +1,49 @@
+// 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/animation/FontWeightConversion.h"
+
+#include "platform/wtf/MathExtras.h"
+#include "platform/wtf/StdLibExtras.h"
+
+namespace blink {
+
+double fontWeightToDouble(FontWeight fontWeight) {
+  switch (fontWeight) {
+    case FontWeight100:
+      return 100;
+    case FontWeight200:
+      return 200;
+    case FontWeight300:
+      return 300;
+    case FontWeight400:
+      return 400;
+    case FontWeight500:
+      return 500;
+    case FontWeight600:
+      return 600;
+    case FontWeight700:
+      return 700;
+    case FontWeight800:
+      return 800;
+    case FontWeight900:
+      return 900;
+    default:
+      NOTREACHED();
+      return 400;
+  }
+}
+
+FontWeight doubleToFontWeight(double value) {
+  static const FontWeight fontWeights[] = {
+      FontWeight100, FontWeight200, FontWeight300, FontWeight400, FontWeight500,
+      FontWeight600, FontWeight700, FontWeight800, FontWeight900,
+  };
+
+  int index = round(value / 100 - 1);
+  int clampedIndex = clampTo<int>(index, 0, WTF_ARRAY_LENGTH(fontWeights) - 1);
+  return fontWeights[clampedIndex];
+}
+
+}  // namespace blink