Add an about:flag for enabling a reader mode toolbar icon.

chrome/common/chrome_switches.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/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 534 matching lines @@
 
 // Enable use of Chromium's port selection for the ephemeral port via bind().
 // This only has an effect if QUIC protocol is enabled.
 const char kEnableQuicPortSelection[]       = "enable-quic-port-selection";
 
 // Enables use of time-base loss detection for QUIC connections.
 // This only has an effect if QUIC protocol is enabled.
 const char kEnableQuicTimeBasedLossDetection[] =
     "enable-quic-time-based-loss-detection";
 
+// Enables context-sensitive reader mode button in the toolbar.
+const char kEnableReaderModeToolbarIcon[]      = "enable-reader-mode-toolbar-icon";
+
 // Enables save password prompt bubble.
 const char kEnableSavePasswordBubble[]      = "enable-save-password-bubble";
 
 // Enables SDCH for https schemes.
 const char kEnableSdchOverHttps[] = "enable-sdch-over-https";
 
 // Controls which branch of the "search button in omnibox" experiment is
 // enabled.
 //
 // We're using independent flags here (as opposed to a common flag with
@@ skipping 798 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead, please
 // put them in alphabetical order above, or in order inside the appropriate
 // ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches