Flip the flag to enable smooth screen rotation by default.

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 2697 matching lines @@
 #if defined(OS_CHROMEOS) || defined(OS_LINUX) || defined(OS_MACOSX) || \
     defined(OS_WIN)
     {pausetabs::kFeatureName, flag_descriptions::kPauseBackgroundTabsName,
      flag_descriptions::kPauseBackgroundTabsDescription, kOsDesktop,
      FEATURE_WITH_PARAMS_VALUE_TYPE(pausetabs::kFeature,
                                     kPauseBackgroundTabsVariations,
                                     "PauseBackgroundTabs")},
 #endif
 
 #if defined(USE_ASH)
-    {"ash-enable-smooth-screen-rotation",
-     flag_descriptions::kAshEnableSmoothScreenRotationName,
-     flag_descriptions::kAshEnableSmoothScreenRotationDescription, kOsCrOS,
-     SINGLE_VALUE_TYPE(ash::switches::kAshEnableSmoothScreenRotation)},
+    {"ash-disable-smooth-screen-rotation",
+     flag_descriptions::kAshDisableSmoothScreenRotationName,
+     flag_descriptions::kAshDisableSmoothScreenRotationDescription, kOsCrOS,
+     SINGLE_DISABLE_VALUE_TYPE(ash::switches::kAshDisableSmoothScreenRotation)},
 #endif  // defined(USE_ASH)
 
 #if defined(OS_CHROMEOS)
     {"enable-zip-archiver-on-file-manager",
      flag_descriptions::kEnableZipArchiverOnFileManagerName,
      flag_descriptions::kEnableZipArchiverOnFileManagerDescription, kOsCrOS,
      SINGLE_VALUE_TYPE(chromeos::switches::kEnableZipArchiverOnFileManager)},
 #endif  // OS_CHROMEOS
 
 #if defined(OS_ANDROID)
@@ skipping 240 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags