Adds a pref and a policy to decide if PDFs should always be opened externally.

chrome/common/pref_names.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/common/pref_names.h"
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/common/pref_font_webkit_names.h"
 
@@ skipping 962 matching lines @@
 // List pref containing names of plugins that are disabled by policy.
 const char kPluginsDisabledPlugins[] = "plugins.plugins_disabled";
 
 // List pref containing exceptions to the list of plugins disabled by policy.
 const char kPluginsDisabledPluginsExceptions[] =
     "plugins.plugins_disabled_exceptions";
 
 // List pref containing names of plugins that are enabled by policy.
 const char kPluginsEnabledPlugins[] = "plugins.plugins_enabled";
 
+// Whether Chrome should use its internal PDF viewer or not.
+const char kPluginsAlwaysOpenPdfExternally[] =
+    "plugins.always_open_pdf_externally";
+
 #if defined(ENABLE_PLUGINS)
 // Whether about:plugins is shown in the details mode or not.
 const char kPluginsShowDetails[] = "plugins.show_details";
 #endif
 
 // Boolean that indicates whether outdated plugins are allowed or not.
 const char kPluginsAllowOutdated[] = "plugins.allow_outdated";
 
 // Boolean that indicates whether plugins that require authorization should
 // be always allowed or not.
@@ skipping 1261 matching lines @@
 const char kOriginTrialPublicKey[] = "origin_trials.public_key";
 
 // A list of origin trial features to disable by policy.
 const char kOriginTrialDisabledFeatures[] = "origin_trials.disabled_features";
 
 // Policy that indicates the state of updates for the binary components.
 const char kComponentUpdatesEnabled[] =
     "component_updates.component_updates_enabled";
 
 }  // namespace prefs