Allow controlling the Instant field trial through a command line flag.

chrome/common/chrome_switches.cc

 // Copyright (c) 2011 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 651 matching lines @@
 // setting encodes the target browser and what items to import.
 const char kImport[]                        = "import";
 
 // Perform bookmark importing from an HTML file. The value associated with this
 // setting encodes the file path. It may be used jointly with kImport.
 const char kImportFromFile[]                = "import-from-file";
 
 // Causes the browser to launch directly in incognito mode.
 const char kIncognito[]                     = "incognito";
 
+// Control the Instant field trial. Valid values are defined below. If an
+// unknown value is supplied on the command line, the field trial is disabled.
+const char kInstantFieldTrial[]             = "instant-field-trial";
+// The field trial is forced into the INSTANT_EXPERIMENT group.
+const char kInstantFieldTrialInstant[]      = "instant";
+
 // URL to use for instant. If specified this overrides the url from the
 // TemplateURL.
 const char kInstantURL[]                    = "instant-url";
 
 // Used for testing - keeps browser alive after last browser window closes.
 const char kKeepAliveForTest[]              = "keep-alive-for-test";
 
 // Load an extension from the specified directory.
 const char kLoadExtension[]                 = "load-extension";
 
@@ skipping 564 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