Moved some functions off ExtensionService into a new file extension_util.

chrome/browser/extensions/extension_util.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/extension_util.h"
+
+#include "base/command_line.h"
+#include "chrome/browser/extensions/extension_prefs.h"
+#include "chrome/browser/extensions/extension_service.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/incognito_handler.h"
+#include "chrome/common/extensions/sync_helper.h"
+#include "extensions/common/manifest.h"
+
+using extensions::Extension;
+using extensions::ExtensionPrefs;
+
+namespace extension_util {
+
+bool IsIncognitoEnabled(const std::string& extension_id,
+                        const ExtensionService* service) {
+  if (!service)
+    return false;
+
+  const Extension* extension = service->GetInstalledExtension(extension_id);
+  if (extension && !extension->can_be_incognito_enabled())
+    return false;
+  // If this is an existing component extension we always allow it to
+  // work in incognito mode.
+  if (extension && extension->location() == extensions::Manifest::COMPONENT)
+    return true;
+  if (extension && extension->force_incognito_enabled())
+    return true;
+
+  // Check the prefs.
+  return service->extension_prefs()->IsIncognitoEnabled(extension_id);
+}
+
+void SetIsIncognitoEnabled(const std::string& extension_id,
+                           ExtensionService* service,
+                           bool enabled) {
+  const Extension* extension = service->GetInstalledExtension(extension_id);
+  if (extension && !extension->can_be_incognito_enabled())
+    return;
+  if (extension && extension->location() == extensions::Manifest::COMPONENT) {
+    // This shouldn't be called for component extensions unless it is called
+    // by sync, for syncable component extensions.
+    // See http://crbug.com/112290 and associated CLs for the sordid history.
+    DCHECK(extensions::sync_helper::IsSyncable(extension));
+
+    // If we are here, make sure the we aren't trying to change the value.
+    DCHECK_EQ(enabled, IsIncognitoEnabled(extension_id, service));
+    return;
+  }
+
+  ExtensionPrefs* extension_prefs = service->extension_prefs();
+  // Broadcast unloaded and loaded events to update browser state. Only bother
+  // if the value changed and the extension is actually enabled, since there is
+  // no UI otherwise.
+  bool old_enabled = extension_prefs->IsIncognitoEnabled(extension_id);
+  if (enabled == old_enabled)
+    return;
+
+  extension_prefs->SetIsIncognitoEnabled(extension_id, enabled);
+
+  bool extension_is_enabled = service->extensions()->Contains(extension_id);
+
+  // When we reload the extension the ID may be invalidated if we've passed it
+  // by const ref everywhere. Make a copy to be safe.
+  std::string id = extension_id;
+  if (extension_is_enabled)
+    service->ReloadExtension(id);
+
+  // Reloading the extension invalidates the |extension| pointer.
+  extension = service->GetInstalledExtension(id);
+  if (extension)
+    service->SyncExtensionChangeIfNeeded(*extension);
+}
+
+bool CanCrossIncognito(const Extension* extension,
+                       const ExtensionService* service) {
+  // We allow the extension to see events and data from another profile iff it
+  // uses "spanning" behavior and it has incognito access. "split" mode
+  // extensions only see events for a matching profile.
+  CHECK(extension);
+  return extension_util::IsIncognitoEnabled(extension->id(), service) &&
+         !extensions::IncognitoInfo::IsSplitMode(extension);
+}
+
+bool CanLoadInIncognito(const Extension* extension,
+                        const ExtensionService* service) {
+  if (extension->is_hosted_app())
+    return true;
+  // Packaged apps and regular extensions need to be enabled specifically for
+  // incognito (and split mode should be set).
+  return extensions::IncognitoInfo::IsSplitMode(extension) &&
+         extension_util::IsIncognitoEnabled(extension->id(), service);
+}
+
+bool AllowFileAccess(const Extension* extension,
+                     const ExtensionService* service) {
+  return (CommandLine::ForCurrentProcess()->HasSwitch(
+              switches::kDisableExtensionsFileAccessCheck) ||
+          service->extension_prefs()->AllowFileAccess(extension->id()));
+}
+
+void SetAllowFileAccess(const Extension* extension,
+                        ExtensionService* service,
+                        bool allow) {
+  // Reload to update browser state. Only bother if the value changed and the
+  // extension is actually enabled, since there is no UI otherwise.
+  bool old_allow = AllowFileAccess(extension, service);
+  if (allow == old_allow)
+    return;
+
+  service->extension_prefs()->SetAllowFileAccess(extension->id(), allow);
+
+  bool extension_is_enabled = service->extensions()->Contains(extension->id());
+  if (extension_is_enabled)
+    service->ReloadExtension(extension->id());
+}
+
+}  // namespace extension_util