GTTF: Move core parts of test_launcher down to base.

base/test/test_launcher.h

+// Copyright 2013 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 BASE_TEST_TEST_LAUNCHER_H_
+#define BASE_TEST_TEST_LAUNCHER_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+
+namespace testing {
+class TestCase;
+class TestInfo;
+}
+
+namespace base {
+
+// Constants for GTest command-line flags.
+extern const char kGTestFilterFlag[];
+extern const char kGTestListTestsFlag[];
+extern const char kGTestRepeatFlag[];
+extern const char kGTestRunDisabledTestsFlag[];
+extern const char kGTestOutputFlag[];
+
+// Interface for use with LaunchTests that abstracts away exact details
+// which tests and how are run.
+class TestLauncherDelegate {
+ public:
+  // Called before any other method. Allows the delegate to perform
+  // initialization, and informs it about sharding parameters.
+  // Should return true on success.
+  virtual bool Initialize(int total_shards, int shard_index) = 0;
+
+  // Called before a test is considered for running. If it returns false,
+  // the test is not run. If it returns true, the test will be run provided
+  // it is part of the current shard.
+  virtual bool ShouldRunTest(const testing::TestCase* test_case,
+                             const testing::TestInfo* test_info) = 0;
+
+  // Called to make the delegate run specified test. Should return true
+  // on success.
+  virtual bool RunTest(const testing::TestCase* test_case,
+                       const testing::TestInfo* test_info) = 0;
+
+ protected:
+  virtual ~TestLauncherDelegate();
+};
+
+// Launches GTest-based tests from the current executable
+// using |launcher_delegate|.
+int LaunchTests(TestLauncherDelegate* launcher_delegate,
+                int argc,
+                char** argv) WARN_UNUSED_RESULT;
+
+}  // namespace base
+
+#endif  // BASE_TEST_TEST_LAUNCHER_H_