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

third_party/WebKit/Source/core/css/SelectorChecker.cpp

Index: third_party/WebKit/Source/core/css/SelectorChecker.cpp
diff --git a/third_party/WebKit/Source/core/css/SelectorChecker.cpp b/third_party/WebKit/Source/core/css/SelectorChecker.cpp
index e63273807004df09b43bca3920d39fc2af4dd16e..da7b0ec8448154b902f39bd90eaddb3883185a1e 100644
--- a/third_party/WebKit/Source/core/css/SelectorChecker.cpp
+++ b/third_party/WebKit/Source/core/css/SelectorChecker.cpp
@@ -884,7 +884,7 @@
         if (context.inRightmostCompound) {
           m_elementStyle->setAffectedByDrag();
         } else {
-          m_elementStyle->setUnique(true);
+          m_elementStyle->setUnique();
           element.setChildrenOrSiblingsAffectedByDrag();
         }
       }
@@ -896,7 +896,7 @@
         if (context.inRightmostCompound) {
           m_elementStyle->setAffectedByFocus();
         } else {
-          m_elementStyle->setUnique(true);
+          m_elementStyle->setUnique();
           element.setChildrenOrSiblingsAffectedByFocus();
         }
       }
@@ -908,7 +908,7 @@
         if (context.inRightmostCompound) {
           m_elementStyle->setAffectedByHover();
         } else {
-          m_elementStyle->setUnique(true);
+          m_elementStyle->setUnique();
           element.setChildrenOrSiblingsAffectedByHover();
         }
       }
@@ -925,7 +925,7 @@
         if (context.inRightmostCompound) {
           m_elementStyle->setAffectedByActive();
         } else {
-          m_elementStyle->setUnique(true);
+          m_elementStyle->setUnique();
           element.setChildrenOrSiblingsAffectedByActive();
         }
       }