Implement about:labs

Tabpose is currently the only lab on mac, tabs-on-left the only lab on windows. Nothing for linux yet.

BUG=53399
TEST=Go to about:labs. Should have one feature on windows and osx each, none on linux yet. about:labs should not be visible on the stable channel. Labs that were enabled on the dev channel should not be enabled on the stable channel. about:labs in chromeos should still work (they use a different implementation)

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=57635

Review URL: http://codereview.chromium.org/3152055

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57670 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 37 insertions, 0 deletions

diff --git a/chrome/browser/labs.h b/chrome/browser/labs.h
new file mode 100644
index 0000000..0c61b95
--- /dev/null
+++ b/chrome/browser/labs.h
@@ -0,0 +1,37 @@
+// Copyright (c) 2010 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.
+
+#ifndef CHROME_BROWSER_LABS_H_
+#define CHROME_BROWSER_LABS_H_
+#pragma once
+
+#include <string>
+
+class CommandLine;
+class ListValue;
+class Profile;
+
+// Can't be called "labs", that collides with the C function |labs()|.
+namespace about_labs {
+
+// Returns if Labs is enabled (it isn't on the stable channel).
+bool IsEnabled();
+
+// Reads the Labs pref from |profile| and adds the commandline flags belonging
+// to the active experiments to |command_line|.
+void ConvertLabsToSwitches(Profile* profile, CommandLine* command_line);
+
+// Get a list of all available experiments. The caller owns the result.
+ListValue* GetLabsExperimentsData(Profile* profile);
+
+// Returns true if one of the experiment flags has been flipped since startup.
+bool IsRestartNeededToCommitChanges();
+
+// Enables or disables the experiment with id |internal_name|.
+void SetExperimentEnabled(
+    Profile* profile, const std::string& internal_name, bool enable);
+
+}  // namespace Labs
+
+#endif  // CHROME_BROWSER_LABS_H_