Update file-level comment for gin::IsolateHolder

BUG=368728
R=abarth@chromium.org

Review URL: https://codereview.chromium.org/261823009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@267972 0039d316-1c4b-4281-b951-d872f2087c98

gin/public/isolate_holder.h

@@ -16,12 +16,12 @@ class PerIsolateData;
 
 // To embed Gin, first create an instance of IsolateHolder to hold the
 // v8::Isolate in which you will execute JavaScript. You might wish to subclass
-// IsolateHolder if you want to tie more state to the lifetime of the
+// IsolateHolder if you want to tie more state to the lifetime of the isolate.
 //
 // You can use gin in two modes: either gin manages V8, or the gin-embedder
-// manages gin. If gin manages V8, use the IsolateHolder constructor without
-// parameters, otherwise, the gin-embedder needs to create v8::Isolates and
-// pass them to IsolateHolder.
+// manages gin. If gin manages V8, use the IsolateHolder constructor that does
+// not take an v8::Isolate parameter, otherwise, the gin-embedder needs to
+// create v8::Isolates and pass them to IsolateHolder.
 //
 // It is not possible to mix the two.
 class GIN_EXPORT IsolateHolder {