Flip the flag to enable smooth screen rotation by default.

chrome/browser/flag_descriptions.cc

 // Copyright 2017 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/flag_descriptions.h"
 
 namespace flag_descriptions {
 
 //  Material Design version of chrome://bookmarks
 
@@ skipping 736 matching lines @@
 
 const char kAshScreenOrientationLockDescription[] =
     "Allows javascript to lock the screen orienation.";
 
 const char kAshEnableMirroredScreenName[] = "Enable mirrored screen mode.";
 
 const char kAshEnableMirroredScreenDescription[] =
     "Enable the mirrored screen mode. This mode flips the screen image "
     "horizontally.";
 
-const char kAshEnableSmoothScreenRotationName[] =
-    "Enable smooth rotation animations.";
+const char kAshDisableSmoothScreenRotationName[] =
+    "Disable smooth rotation animations.";
 
-const char kAshEnableSmoothScreenRotationDescription[] =
-    "Enable smooth rotation animations.";
+const char kAshDisableSmoothScreenRotationDescription[] =
+    "Disable smooth rotation animations.";
 
 const char kMaterialDesignInkDropAnimationFast[] = "Fast";
 
 const char kMaterialDesignInkDropAnimationSlow[] = "Slow";
 
 const char kMaterialDesignInkDropAnimationSpeedName[] =
     "Material Design Ink Drop Animation Speed";
 
 const char kMaterialDesignInkDropAnimationSpeedDescription[] =
     "Sets the speed of the experimental visual feedback animations for "
@@ skipping 2275 matching lines @@
 const char kEnableOmniboxClipboardProviderName[] =
     "Omnibox clipboard URL suggestions";
 
 const char kEnableOmniboxClipboardProviderDescription[] =
     "Provide a suggestion of the URL stored in the clipboard (if any) upon "
     "focus in the omnibox.";
 
 #endif  // defined(OS_ANDROID)
 
 }  // namespace flag_descriptions