Printing: Remove an unused variable, update some obsolete comments, and remove an unneeded prefs check.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/8386028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@108378 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 6 insertions, 4 deletions

diff --git a/chrome/browser/printing/print_job_manager.h b/chrome/browser/printing/print_job_manager.h
index 72548da..8d37537f 100644
--- a/chrome/browser/printing/print_job_manager.h
+++ b/chrome/browser/printing/print_job_manager.h
@@ -19,9 +19,7 @@ class PrefService;
 namespace printing {
 
 class JobEventDetails;
-class PrintedDocument;
 class PrintJob;
-class PrintedPage;
 class PrinterQuery;
 
 class PrintJobManager : public content::NotificationObserver {
@@ -73,10 +71,14 @@ class PrintJobManager : public content::NotificationObserver {
   // Used to serialize access to queued_workers_.
   base::Lock lock_;
 
-  // Printing is enabled/disabled. This variable is checked at only one place,
-  // by RenderMessageFilter::OnGetDefaultPrintSettings. If its value is true
+  // Printing is enabled/disabled. For printing with the native print dialog,
+  // this variable is checked at only one place, by
+  // PrintingMessageFilter::OnGetDefaultPrintSettings. If its value is true
   // at that point, then the initiated print flow will complete itself,
   // even if the value of this variable changes afterwards.
+  // In the print preview workflow, this variable is checked in
+  // PrintingMessageFilter::OnUpdatePrintSettings, which gets called multiple
+  // times in the print preview workflow.
   BooleanPrefMember printing_enabled_;
 
   PrinterQueries queued_queries_;