Fixed comment about :host in SelectorChecker.

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 b8aeae9ba96433850fc794b8281f62207a499293..aae1bd566c13e8a86e56a8d514e5dee5b63cce7c 100644
--- a/third_party/WebKit/Source/core/css/SelectorChecker.cpp
+++ b/third_party/WebKit/Source/core/css/SelectorChecker.cpp
@@ -1015,8 +1015,8 @@ bool SelectorChecker::checkPseudoHost(const SelectorCheckingContext& context, Ma
         return false;
     ASSERT(element.shadow());
 
-    // For empty parameter case, i.e. just :host or :host().
-    if (!selector.selectorList()) // Use *'s specificity. So just 0.
+    // For the case with no parameters, i.e. just :host.
+    if (!selector.selectorList())
         return true;
 
     SelectorCheckingContext subContext(context);