Removing canvas rendering mode switching feature

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 353 matching lines @@
 const char kAccelerated2dCanvasDescription[] =
     "Enables the use of the GPU to perform 2d canvas rendering instead of "
     "using software rendering.";
 
 const char kDisplayList2dCanvasName[] = "Display list 2D canvas";
 
 const char kDisplayList2dCanvasDescription[] =
     "Enables the use of display lists to record 2D canvas commands. This "
     "allows 2D canvas rasterization to be performed on separate thread.";
 
-const char kEnable2dCanvasDynamicRenderingModeSwitchingName[] =
-    "Enable 2D canvas dynamic rendering mode switching.";
-
-const char kEnable2dCanvasDynamicRenderingModeSwitchingDescription[] =
-    "There are multiple implementations of the graphics rendering pipeline "
-    "for the 2D canvas. These different implementations have different "
-    "performance characteristics. Turning on this flag allows canvas 2D "
-    "contexts to switch between these implementations on the fly based on "
-    "how the canvas is used in order to increase performance. For example, "
-    "going from an implementation that uses the GPU to one that doesn't.";
-
 const char kExperimentalExtensionApisName[] = "Experimental Extension APIs";
 
 const char kExperimentalExtensionApisDescription[] =
     "Enables experimental extension APIs. Note that the extension gallery "
     "doesn't allow you to upload extensions that use experimental APIs.";
 
 const char kExtensionsOnChromeUrlsName[] = "Extensions on chrome:// URLs";
 
 const char kExtensionsOnChromeUrlsDescription[] =
     "Enables running extensions on chrome:// URLs, where extensions "
@@ skipping 2801 matching lines @@
 
 const char kDisableNewVirtualKeyboardBehaviorName[] =
     "New window behavior for the accessibility keyboard";
 const char kDisableNewVirtualKeyboardBehaviorDescription[] =
     "Disable new window behavior for the accessibility keyboard "
     "in non-sticky mode (do not change work area in non-sticky mode).";
 
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace flag_descriptions