[ozone] Add an about flag to enable ozone overlay testing.

chrome/browser/about_flags.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/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 48 matching lines @@
 #endif
 
 #if defined(ENABLE_APP_LIST)
 #include "ui/app_list/app_list_switches.h"
 #endif
 
 #if defined(ENABLE_EXTENSIONS)
 #include "extensions/common/switches.h"
 #endif
 
+#if defined(USE_OZONE)
+#include "ui/ozone/public/ozone_switches.h"
+#endif
+
 namespace about_flags {
 
 // Macros to simplify specifying the type.
 #define SINGLE_VALUE_TYPE_AND_VALUE(command_line_switch, switch_value) \
     Experiment::SINGLE_VALUE, \
     command_line_switch, switch_value, NULL, NULL, NULL, 0
 #define SINGLE_VALUE_TYPE(command_line_switch) \
     SINGLE_VALUE_TYPE_AND_VALUE(command_line_switch, "")
 #define ENABLE_DISABLE_VALUE_TYPE_AND_VALUE(enable_switch, enable_value, \
                                             disable_switch, disable_value) \
@@ skipping 2099 matching lines @@
   },
   {
     "use-sync-sandbox",
     IDS_FLAGS_SYNC_SANDBOX_NAME,
     IDS_FLAGS_SYNC_SANDBOX_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE_AND_VALUE(
         switches::kSyncServiceURL,
         "https://chrome-sync.sandbox.google.com/chrome-sync/alpha")
   },
+#if defined(OS_CHROMEOS) && defined(USE_OZONE)
+  {
+    "ozone-test-single-overlay-support",
+    IDS_FLAGS_OZONE_TEST_SINGLE_HARDWARE_OVERLAY,
+    IDS_FLAGS_OZONE_TEST_SINGLE_HARDWARE_OVERLAY_DESCRIPTION,
+    kOsCrOS,
+    SINGLE_VALUE_TYPE(switches::kOzoneTestSingleOverlaySupport)
+  },
+#endif  // defined(OS_CHROMEOS) && defined(USE_OZONE)
 
   // NOTE: Adding new command-line switches requires adding corresponding
   // entries to enum "LoginCustomFlags" in histograms.xml. See note in
   // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.
 };
 
 const Experiment* experiments = kExperiments;
 size_t num_experiments = arraysize(kExperiments);
 
 // Stores and encapsulates the little state that about:flags has.
@@ skipping 583 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags