content: implement unittests backend for Ozone GBM

base/test/launcher/unit_test_launcher.cc

 // 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.
 
 #include "base/test/launcher/unit_test_launcher.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
@@ skipping 173 matching lines @@
     if (base::debug::BeingDebugged()) {
       fprintf(stdout,
               "Debugger detected, switching to single process mode.\n"
               "Pass --test-launcher-debug-launcher to debug the launcher "
               "itself.\n");
       fflush(stdout);
       force_single_process = true;
     }
   }
 
+#if defined(USE_OZONE)
+  // It's prohibited multi-processes from taking card0. Only DRM master
+  // can take it. crbug.com/475633
+  force_single_process = true;

[spang, 2015/12/02 17:00:03]

I don't think this is worth losing parallelism over - we don't run base unit
tests with gbm in the typical case.

[dshwang, 2015/12/08 01:12:38]

I agree. do you have good idea?

My idea is 
- this class provide some hook or interface which client tests can add
additional command line.
- OzoneInitializerForTest or content_test_suite add additional command line via
the interface.

It will bloat the code.

[dshwang, 2015/12/08 22:19:33]

What I really want is that content_unittests and gl_unittests has
kSingleProcessTestsFlag command line on only ozone. Do you have good idea?

[dshwang, 2015/12/08 23:04:34]

Interesting. I assume that we will make test bots cover ozone-gbm. However, you
imply you don't have any plan.

Got it. Let's re-visit when we make test bots cover ozone-gbm.

+#endif
+
   if (CommandLine::ForCurrentProcess()->HasSwitch(kGTestHelpFlag) ||
       CommandLine::ForCurrentProcess()->HasSwitch(kGTestListTestsFlag) ||
       CommandLine::ForCurrentProcess()->HasSwitch(kSingleProcessTestsFlag) ||
       CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kTestChildProcess) ||
       force_single_process) {
     return run_test_suite.Run();
   }
 #endif
 
@@ skipping 416 matching lines @@
     TestLauncher* test_launcher,
     const std::vector<std::string>& test_names) {
   ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       Bind(&RunUnitTestsSerially, test_launcher, platform_delegate_, test_names,
            use_job_objects_ ? TestLauncher::USE_JOB_OBJECTS : 0));
   return test_names.size();
 }
 
 }  // namespace base