[PIP] Add picture in picture flag and switch.

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 3000 matching lines @@
      FEATURE_VALUE_TYPE(features::kMacRTL)},
 #endif  // defined(OS_MACOSX)
 
 #if defined(OS_CHROMEOS)
     {"disable-new-virtual-keyboard-behavior",
      flag_descriptions::kDisableNewVirtualKeyboardBehaviorName,
      flag_descriptions::kDisableNewVirtualKeyboardBehaviorDescription, kOsCrOS,
      SINGLE_DISABLE_VALUE_TYPE(switches::kDisableNewVirtualKeyboardBehavior)},
 #endif  // defined(OS_CHROMEOS)
 
+#if !defined(OS_ANDROID) && !defined(OS_IOS)
+    {"enable-picture-in-picture",
+     flag_descriptions::kEnablePictureInPictureName,
+     flag_descriptions::kEnablePictureInPictureDescription, kOsDesktop,
+     SINGLE_VALUE_TYPE(switches::kEnablePictureInPicture)},
+#endif  // !defined(OS_ANDROID) && !defined(OS_IOS)
+
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms/enums.xml. See note in
     // enums.xml and don't forget to run AboutFlagsHistogramTest unit test.
 };
 
 class FlagsStateSingleton {
  public:
   FlagsStateSingleton()
       : flags_state_(kFeatureEntries, arraysize(kFeatureEntries)) {}
   ~FlagsStateSingleton() {}
@@ skipping 205 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags