Remove unsafe mode to enable es3 api by default for WebGL2 and ES3 context

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 1771 matching lines @@
      IDS_FLAGS_SET_MARKET_URL_FOR_TESTING_DESCRIPTION, kOsAndroid,
      SINGLE_VALUE_TYPE_AND_VALUE(
          switches::kMarketUrlForTesting,
          "https://play.google.com/store/apps/details?id=com.android.chrome")},
 #endif  // OS_ANDROID
 #if defined(OS_WIN) || defined(OS_MACOSX)
     {"automatic-tab-discarding", IDS_FLAGS_AUTOMATIC_TAB_DISCARDING_NAME,
      IDS_FLAGS_AUTOMATIC_TAB_DISCARDING_DESCRIPTION, kOsWin | kOsMac,
      FEATURE_VALUE_TYPE(features::kAutomaticTabDiscarding)},
 #endif  // OS_WIN || OS_MACOSX
-    {"enable-unsafe-es3-apis", IDS_FLAGS_WEBGL2_NAME,
-     IDS_FLAGS_WEBGL2_DESCRIPTION, kOsAll,
-     SINGLE_VALUE_TYPE(switches::kEnableUnsafeES3APIs)},
     {"enable-webfonts-intervention-v2",
      IDS_FLAGS_ENABLE_WEBFONTS_INTERVENTION_NAME,
      IDS_FLAGS_ENABLE_WEBFONTS_INTERVENTION_DESCRIPTION, kOsAll,
      MULTI_VALUE_TYPE(kEnableWebFontsInterventionV2Choices)},
     {"enable-webfonts-intervention-trigger",
      IDS_FLAGS_ENABLE_WEBFONTS_INTERVENTION_TRIGGER_NAME,
      IDS_FLAGS_ENABLE_WEBFONTS_INTERVENTION_TRIGGER_DESCRIPTION, kOsAll,
      SINGLE_VALUE_TYPE(switches::kEnableWebFontsInterventionTrigger)},
     {"enable-grouped-history", IDS_FLAGS_ENABLE_GROUPED_HISTORY_NAME,
      IDS_FLAGS_ENABLE_GROUPED_HISTORY_DESCRIPTION, kOsDesktop,
@@ skipping 471 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags