Revert "Remove impl-side-painting from 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 1114 matching lines @@
   {
     "enable-avfoundation",
     IDS_FLAGS_ENABLE_AVFOUNDATION_NAME,
     IDS_FLAGS_ENABLE_AVFOUNDATION_DESCRIPTION,
     kOsMac,
     ENABLE_DISABLE_VALUE_TYPE(switches::kEnableAVFoundation,
                               switches::kForceQTKit)
   },
 #endif
   {
+    "impl-side-painting",
+    IDS_FLAGS_IMPL_SIDE_PAINTING_NAME,
+    IDS_FLAGS_IMPL_SIDE_PAINTING_DESCRIPTION,
+    kOsAll,
+    ENABLE_DISABLE_VALUE_TYPE(switches::kEnableImplSidePainting,
+                              switches::kDisableImplSidePainting)
+  },
+  {
     "lcd-text-aa",
     IDS_FLAGS_LCD_TEXT_NAME,
     IDS_FLAGS_LCD_TEXT_DESCRIPTION,
     kOsDesktop,
     ENABLE_DISABLE_VALUE_TYPE(switches::kEnableLCDText,
                               switches::kDisableLCDText)
   },
 #if defined(OS_ANDROID) || defined(OS_MACOSX)
   {
     "delegated-renderer",
@@ skipping 1524 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags