Policy to disable printing

Make Chrome refuse to print if the preference kPrintingEnabled is set to false. In this case, the 'Print...' option in the wrench menu is disabled, and if printing is invoked from JavaScript, then Chrome reports that no printer is installed.

Changes to this preference after startup are also respected.

BUG=54380
TEST=manual

Review URL: http://codereview.chromium.org/3357011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@61222 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 16 insertions, 3 deletions

diff --git a/chrome/browser/browser.cc b/chrome/browser/browser.cc
index a504887..4e5128a 100644
--- a/chrome/browser/browser.cc
+++ b/chrome/browser/browser.cc
@@ -244,6 +244,15 @@ Browser::Browser(Type type, Profile* profile)
       !profile->IsOffTheRecord()) {
     match_preview_.reset(new MatchPreview(this));
   }
+
+  PrefService *local_state = g_browser_process->local_state();
+  if (local_state) {
+    printing_enabled_.Init(prefs::kPrintingEnabled, local_state, this);
+    command_updater_.UpdateCommandEnabled(IDC_PRINT,
+                                          printing_enabled_.GetValue());
+  } else {
+    command_updater_.UpdateCommandEnabled(IDC_PRINT, true);
+  }
 }
 
 Browser::~Browser() {
@@ -3202,10 +3211,15 @@ void Browser::Observe(NotificationType type,
     }
 
     case NotificationType::PREF_CHANGED: {
-      if (*(Details<std::string>(details).ptr()) == prefs::kUseVerticalTabs)
+      const std::string& pref_name = *Details<std::string>(details).ptr();
+      if (pref_name == prefs::kUseVerticalTabs) {
         UseVerticalTabsChanged();
-      else
+      } else if (pref_name == prefs::kPrintingEnabled) {
+        command_updater_.UpdateCommandEnabled(IDC_PRINT,
+                                              printing_enabled_.GetValue());
+      } else {
         NOTREACHED();
+      }
       break;
     }
 
@@ -3289,7 +3303,6 @@ void Browser::InitCommandState() {
 
   // Page-related commands
   command_updater_.UpdateCommandEnabled(IDC_EMAIL_PAGE_LOCATION, true);
-  command_updater_.UpdateCommandEnabled(IDC_PRINT, true);
   command_updater_.UpdateCommandEnabled(IDC_ENCODING_AUTO_DETECT, true);
   command_updater_.UpdateCommandEnabled(IDC_ENCODING_UTF8, true);
   command_updater_.UpdateCommandEnabled(IDC_ENCODING_UTF16LE, true);