Remove default argument on ComputedStyle::setHasViewportUnits().

third_party/WebKit/Source/core/style/ComputedStyle.h

Index: third_party/WebKit/Source/core/style/ComputedStyle.h
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.h b/third_party/WebKit/Source/core/style/ComputedStyle.h
index 337d4ed513b0b45fe942d8bf1699a171a02a6008..1c521e57445e13919d2207951570d3f60c84884f 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.h
@@ -2346,7 +2346,8 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase,
   bool hasViewportUnits() const {
     return m_nonInheritedData.m_hasViewportUnits;
   }
-  void setHasViewportUnits(bool hasViewportUnits = true) {
+  // TODO(shend): This function should take no arguments.
+  void setHasViewportUnits(bool hasViewportUnits) {
     m_nonInheritedData.m_hasViewportUnits = hasViewportUnits;
   }