add support for forcing compositing mode

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"
 
 namespace switches {
 
@@ skipping 593 matching lines @@
 const char kFocusExistingTabOnOpen[]        = "focus-existing-tab-on-open";
 
 // Display the First Run experience when the browser is started, regardless of
 // whether or not it's actually the first run.
 const char kFirstRun[]                      = "first-run";
 
 // Forces the apps/webstore promo to be shown, independent of whether it has
 // timed out, etc. Useful for testing.
 const char kForceAppsPromoVisible[]         = "force-apps-promo-visible";
 
+// If accelerated compositing is supported, always enter compositing mode for
+// the base layer even when compositing is not strictly required.
+const char kForceCompositingMode[]          = "force-compositing-mode";
+
 // Some field tests may rendomized in the browser, and the randomly selected
 // outcome needs to be propogated to the renderer.  For instance, this is used
 // to modify histograms recorded in the renderer, or to get the renderer to
 // also set of its state (initialize, or not initialize components) to match the
 // experiment(s).
 // The argument is a string-ized list of experiment names, and the associated
 // value that was randomly selected.  In the recent implementetaion, the
 // persistent representation generated by field_trial.cc and later decoded, is a
 // list of name and value pairs, separated by slashes. See field trial.cc for
 // current details.
@@ skipping 573 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