screenshot disabling policy

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/api/tabs/tabs.h"
 
 #include <algorithm>
 #include <limits>
 #include <vector>
 
@@ skipping 12 matching lines @@
 #include "chrome/browser/extensions/extension_function_dispatcher.h"
 #include "chrome/browser/extensions/extension_function_util.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_tab_helper.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/extensions/extension_window_controller.h"
 #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"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_navigator.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/browser_window.h"
@@ skipping 1549 matching lines @@
     error_ = keys::kInternalVisibleTabCaptureError;
     return false;
   }
 
   *tab_contents = chrome::GetActiveTabContents(browser);
 
   return true;
 };
 
 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))
     return false;
 
   image_format_ = FORMAT_JPEG;  // Default format is JPEG.
   image_quality_ = kDefaultQuality;  // Default quality setting.
 
   if (HasOptionalArgument(1)) {
     DictionaryValue* options = NULL;
@@ skipping 137 matching lines @@
   base::StringPiece stream_as_string(
       reinterpret_cast<const char*>(vector_as_array(&data)), data.size());
 
   base::Base64Encode(stream_as_string, &base64_result);
   base64_result.insert(0, base::StringPrintf("data:%s;base64,",
                                              mime_type.c_str()));
   result_.reset(new StringValue(base64_result));
   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;
   TabContents* contents = NULL;
 
   // If |tab_id| is specified, look for it. Otherwise default to selected tab
   // in the current window.
   if (HasOptionalArgument(0)) {
     EXTENSION_FUNCTION_VALIDATE(args_->GetInteger(0, &tab_id));
     if (!GetTabById(tab_id, profile(), include_incognito(),
@@ skipping 57 matching lines @@
   // called for every API call the extension made.
   GotLanguage(language);
 }
 
 void DetectTabLanguageFunction::GotLanguage(const std::string& language) {
   result_.reset(Value::CreateStringValue(language.c_str()));
   SendResponse(true);
 
   Release();  // Balanced in Run()
 }