screenshot disabling policy

chrome/browser/extensions/api/tabs/tabs.cc

Index: chrome/browser/extensions/api/tabs/tabs.cc
diff --git a/chrome/browser/extensions/api/tabs/tabs.cc b/chrome/browser/extensions/api/tabs/tabs.cc
index 3d80a52e7ef640dd813a48194a717a80f717f276..0cb409de6f45bb55763b5a33206864ee8c892bb2 100644
--- a/chrome/browser/extensions/api/tabs/tabs.cc
+++ b/chrome/browser/extensions/api/tabs/tabs.cc
@@ -30,6 +30,7 @@
 #include "chrome/browser/extensions/extension_window_list.h"
 #include "chrome/browser/extensions/script_executor.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
+#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/restore_tab_helper.h"
 #include "chrome/browser/translate/translate_tab_helper.h"
@@ -1599,6 +1600,12 @@ bool CaptureVisibleTabFunction::GetTabToCapture(
 };
 
 bool CaptureVisibleTabFunction::RunImpl() {
+  PrefService* service = profile()->GetPrefs();
+  if (service->GetBoolean(prefs::kDisableScreenshots)) {
+    error_ = keys::kScreenshotsDisabled;
+    return false;
+  }
+
   WebContents* web_contents = NULL;
   TabContents* tab_contents = NULL;
   if (!GetTabToCapture(&web_contents, &tab_contents))
@@ -1756,6 +1763,11 @@ void CaptureVisibleTabFunction::SendResultFromBitmap(
   SendResponse(true);
 }
 
+void CaptureVisibleTabFunction::RegisterUserPrefs(PrefService* service) {
+  service->RegisterBooleanPref(prefs::kDisableScreenshots, false,
+                               PrefService::UNSYNCABLE_PREF);
+}
+
 bool DetectTabLanguageFunction::RunImpl() {
   int tab_id = 0;
   Browser* browser = NULL;