screenshot disabling policy

chrome/browser/ui/window_snapshot/window_snapshot.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/ui/window_snapshot/window_snapshot.h"
+
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/prefs/pref_service.h"
+#include "chrome/common/pref_names.h"
+
+namespace browser {
+
+// The same as GrabWindowSnapshotIfPermitted, but does not check if the
+// operation is permitted by policy settings. Actually this part is fully OS
+// specific, so there's only a declaration here.

[Mattias Nissler (ping if slow), 2012/07/13 15:23:42]

This comment feels a bit chatty. Just saying "Takes a screenshot, implemented in
a platform-specific way." might be good enough.

[qfel, 2012/07/16 09:11:12]

Done.

+bool GrabWindowSnapshot(gfx::NativeWindow window,
+                        std::vector<unsigned char>* png_representation,
+                        const gfx::Rect& snapshot_bounds);
+
+bool GrabWindowSnapshotIfPermitted(gfx::NativeWindow window,
+    std::vector<unsigned char>* png_representation,
+    const gfx::Rect& snapshot_bounds) {
+  if (g_browser_process->local_state()->GetBoolean(prefs::kDisableScreenshots))
+    return false;
+  return GrabWindowSnapshot(window, png_representation, snapshot_bounds);
+}
+
+void RegisterScreenshotPrefs(PrefService* service) {
+  service->RegisterBooleanPref(prefs::kDisableScreenshots, false);
+}
+
+}  // namespace browser