Add "AllArticles" mode to Reader Mode heuristics

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 {
 
 const char kBrowserSideNavigationName[] = "Enable browser side navigation";
 
@@ skipping 1913 matching lines @@
 
 #endif  // defined(OS_ANDROID)
 
 //  Reader mode experiment flags
 
 #if defined(OS_ANDROID)
 
 const char kReaderModeHeuristicsName[] = "Reader Mode triggering";
 
 const char kReaderModeHeuristicsDescription[] =
-    "Determines what pages the Reader Mode button is shown on.";
+    "Determines what pages the Reader Mode infobar is shown on.";
 
 const char kReaderModeHeuristicsMarkup[] = "With article structured markup";
 
-const char kReaderModeHeuristicsAdaboost[] = "Appears to be an article";
+const char kReaderModeHeuristicsAdaboost[] = "Non-mobile-friendly articles";
+
+const char kReaderModeHeuristicsAllArticles[] = "All articles";
 
 const char kReaderModeHeuristicsAlwaysOff[] = "Never";
 
 const char kReaderModeHeuristicsAlwaysOn[] = "Always";
 
 #endif  // defined(OS_ANDROID)
 
 //  Chrome home flags
 
 #if defined(OS_ANDROID)
@@ skipping 1296 matching lines @@
     "in non-sticky mode (do not change work area in non-sticky mode).";
 
 const char kUiDevToolsName[] = "Enable native UI inspection";
 const char kUiDevToolsDescription[] =
     "Enables inspection of native UI elements. For local inspection use "
     "chrome://inspect#other";
 
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace flag_descriptions