Update from https://crrev.com/312398

base/test/launcher/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_LAUNCHER_TEST_LAUNCHER_H_
 #define BASE_TEST_LAUNCHER_TEST_LAUNCHER_H_
 
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
+#include "base/test/gtest_util.h"
 #include "base/test/launcher/test_result.h"
 #include "base/test/launcher/test_results_tracker.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 
 namespace testing {
 class TestCase;
 class TestInfo;
 }
 
 namespace base {
 
 class CommandLine;
 struct LaunchOptions;
 class SequencedWorkerPoolOwner;
 class TestLauncher;
 
 // Constants for GTest command-line flags.
 extern const char kGTestFilterFlag[];
 extern const char kGTestHelpFlag[];
 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 to get names of tests available for running. The delegate
+  // must put the result in |output| and return true on success.
+  virtual bool GetTests(std::vector<SplitTestName>* output) = 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 std::string& test_case_name,
                              const std::string& test_name) = 0;
 
   // Called to make the delegate run the specified tests. The delegate must
   // return the number of actual tests it's going to run (can be smaller,
   // equal to, or larger than size of |test_names|). It must also call
   // |test_launcher|'s OnTestFinished method once per every run test,
@@ skipping 98 matching lines @@
   // Support for outer sharding, just like gtest does.
   int32 total_shards_;  // Total number of outer shards, at least one.
   int32 shard_index_;   // Index of shard the launcher is to run.
 
   int cycles_;  // Number of remaining test itreations, or -1 for infinite.
 
   // Test filters (empty means no filter).
   std::vector<std::string> positive_test_filter_;
   std::vector<std::string> negative_test_filter_;
 
+  // Tests to use (cached result of TestLauncherDelegate::GetTests).
+  std::vector<SplitTestName> tests_;
+
   // Number of tests started in this iteration.
   size_t test_started_count_;
 
   // Number of tests finished in this iteration.
   size_t test_finished_count_;
 
   // Number of tests successfully finished in this iteration.
   size_t test_success_count_;
 
   // Number of tests either timing out or having an unknown result,
@@ skipping 26 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(TestLauncher);
 };
 
 // Extract part from |full_output| that applies to |result|.
 std::string GetTestOutputSnippet(const TestResult& result,
                                  const std::string& full_output);
 
 }  // namespace base
 
 #endif  // BASE_TEST_LAUNCHER_TEST_LAUNCHER_H_