ThumbnailTabHelper: Capture thumbnail when page load finishes

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 3078 matching lines @@
 const char kEnableHeapProfilingName[] = "Heap profiling";
 
 const char kEnableHeapProfilingDescription[] = "Enables heap profiling.";
 
 const char kEnableHeapProfilingModePseudo[] = "Enabled (pseudo mode)";
 
 const char kEnableHeapProfilingModeNative[] = "Enabled (native mode)";
 
 const char kEnableHeapProfilingTaskProfiler[] = "Enabled (task mode)";
 
+const char kCaptureThumbnailOnLoadFinishedName[] =
+    "Capture page thumbnail on load finished";
+
+const char kCaptureThumbnailOnLoadFinishedDescription[] =
+    "Capture a page thumbnail (for use on the New Tab page) when the page load "
+    "finishes, in addition to other times a thumbnail may be captured.";
+
 }  // namespace flag_descriptions