Blink: Replace all "plug-in" with "plugin".

Source/core/html/HTMLObjectElement.cpp

Index: Source/core/html/HTMLObjectElement.cpp
diff --git a/Source/core/html/HTMLObjectElement.cpp b/Source/core/html/HTMLObjectElement.cpp
index 21e43bd6e99eab0d21b15f373b384b1b9e189fa5..41e14230ff4bf4b994d9d3b121819435de048d2a 100644
--- a/Source/core/html/HTMLObjectElement.cpp
+++ b/Source/core/html/HTMLObjectElement.cpp
@@ -200,7 +200,7 @@ void HTMLObjectElement::parametersForPlugin(Vector<String>& paramNames, Vector<S
     // HTML5 says that an object resource's URL is specified by the object's data
     // attribute, not by a param element. However, for compatibility, allow the
     // resource's URL to be given by a param named "src", "movie", "code" or "url"
-    // if we know that resource points to a plug-in.
+    // if we know that resource points to a plugin.
     if (url.isEmpty() && !urlParameter.isEmpty()) {
         KURL completedURL = document().completeURL(urlParameter);
         bool useFallback;
@@ -230,7 +230,7 @@ bool HTMLObjectElement::hasValidClassId()
         return true;
 
     // HTML5 says that fallback content should be rendered if a non-empty
-    // classid is specified for which the UA can't find a suitable plug-in.
+    // classid is specified for which the UA can't find a suitable plugin.
     return classId().isEmpty();
 }