Add --enable-hdr to about:flags

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 111 matching lines @@
 #endif  // ENABLE_EXTENSIONS
 
 #if defined(USE_ASH)
 #include "ash/common/ash_switches.h"
 #endif  // USE_ASH
 
 #if defined(USE_OZONE)
 #include "ui/ozone/public/ozone_switches.h"
 #endif  // USE_OZONE
 
+#if defined(OS_WIN)
+#include "base/win/windows_version.h"
+#endif  // OS_WIN
+
 using flags_ui::FeatureEntry;
 using flags_ui::kOsMac;
 using flags_ui::kOsWin;
 using flags_ui::kOsLinux;
 using flags_ui::kOsCrOS;
 using flags_ui::kOsAndroid;
 using flags_ui::kOsCrOSOwnerOnly;
 
 namespace about_flags {
 
@@ skipping 970 matching lines @@
             ash::switches::kAshDisableScreenOrientationLock),
     },
 #endif  // OS_CHROMEOS
     {
         "disable-accelerated-video-decode",
         flag_descriptions::kAcceleratedVideoDecodeName,
         flag_descriptions::kAcceleratedVideoDecodeDescription,
         kOsMac | kOsWin | kOsCrOS | kOsAndroid,
         SINGLE_DISABLE_VALUE_TYPE(switches::kDisableAcceleratedVideoDecode),
     },
+#if defined(OS_WIN)
+    {
+        "enable-hdr", flag_descriptions::kEnableHDRName,
+        flag_descriptions::kEnableHDRDescription, kOsWin,
+        SINGLE_VALUE_TYPE(switches::kEnableHDR),
+    },
+#endif  // OS_WIN
 #if defined(USE_ASH)
     {
         "ash-debug-shortcuts", flag_descriptions::kDebugShortcutsName,
         flag_descriptions::kDebugShortcutsDescription, kOsAll,
         SINGLE_VALUE_TYPE(ash::switches::kAshDebugShortcuts),
     },
     {
         "ash-disable-maximize-mode-window-backdrop",
         flag_descriptions::kAshMaximizeModeWindowBackdropName,
         flag_descriptions::kAshMaximizeModeWindowBackdropDescription, kOsCrOS,
@@ skipping 1408 matching lines @@
   if ((!strcmp("data-reduction-proxy-lo-fi", entry.internal_name) ||
        !strcmp("enable-data-reduction-proxy-lite-page",
                entry.internal_name)) &&
       channel != version_info::Channel::BETA &&
       channel != version_info::Channel::DEV &&
       channel != version_info::Channel::CANARY &&
       channel != version_info::Channel::UNKNOWN) {
     return true;
   }
 
+#if defined(OS_WIN)
+  // HDR mode works, but displays everything horribly wrong prior to windows 10.
+  if (!strcmp("enable-hdr", entry.internal_name) &&
+      base::win::GetVersion() < base::win::Version::VERSION_WIN10) {
+    return true;
+  }
+#endif  // OS_WIN
+
   return false;
 }
 
 // Records a set of feature switches (prefixed with "--").
 void ReportAboutFlagsHistogramSwitches(const std::string& uma_histogram_name,
                                        const std::set<std::string>& switches) {
   for (const std::string& flag : switches) {
     int uma_id = about_flags::testing::kBadSwitchFormatHistogramId;
     if (base::StartsWith(flag, "--", base::CompareCase::SENSITIVE)) {
       // Skip '--' before switch name.
@@ skipping 126 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags