Add a switch for faking channels for Variations filtering.

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 661 matching lines @@
 // The time in seconds that an extension event page has between being notified
 // of its impending unload and that unload happening.
 const char kEventPageUnloadingTime[]        = "event-page-unloading-time";
 
 // Marks a renderer as extension process.
 const char kExtensionProcess[]              = "extension-process";
 
 // Frequency in seconds for Extensions auto-update.
 const char kExtensionsUpdateFrequency[]     = "extensions-update-frequency";
 
+// Fakes the channel of the browser for purposes of Variations filtering. This
+// is to be used for testing only. Possible values are "stable", "beta", "dev"
+// and "canary".

[jwd, 2013/01/04 16:19:07]

What about a comment here about it only applying when the real channel is
unknown?

[SteveT, 2013/01/04 16:27:07]

Done.

+const char kFakeVariationsChannel[] =       "fake-variations-channel";
+
 // These two flags are added around the switches about:flags adds to the
 // command line. This is useful to see which switches were added by about:flags
 // on about:version. They don't have any effect.
 const char kFlagSwitchesBegin[]             = "flag-switches-begin";
 const char kFlagSwitchesEnd[]               = "flag-switches-end";
 
 // Alternative feedback server to use when submitting user feedback
 const char kFeedbackServer[]                = "feedback-server";
 
 // The file descriptor limit is set to the value of this switch, subject to the
@@ skipping 919 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