Revert of Change ComputedStyle::setUnique to take bool parameter.

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 86012dc6f0f45101afe7a6832ac023d687035eb8..88dd1e295373d6973753301a4e4af167bc12d840 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.h
@@ -2548,7 +2548,7 @@
 
   bool emptyState() const { return m_nonInheritedData.m_emptyState; }
   void setEmptyState(bool b) {
-    setUnique(true);
+    setUnique();
     m_nonInheritedData.m_emptyState = b;
   }
 
@@ -2621,7 +2621,7 @@
   // A unique style is one that has matches something that makes it impossible
   // to share.
   bool unique() const { return m_nonInheritedData.m_unique; }
-  void setUnique(bool v) { m_nonInheritedData.m_unique = v; }
+  void setUnique() { m_nonInheritedData.m_unique = true; }
 
   float textAutosizingMultiplier() const {
     return m_styleInheritedData->textAutosizingMultiplier;