cc:: Remove main_frame_before_draw_enabled from scheduler settings.

cc/base/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 "cc/base/switches.h"
 
 #include "base/command_line.h"
 
 namespace cc {
 namespace switches {
 
 const char kDisableThreadedAnimation[] = "disable-threaded-animation";
 
 // Disables layer-edge anti-aliasing in the compositor.
 const char kDisableCompositedAntialiasing[] =
     "disable-composited-antialiasing";
 
-// Disables sending the next BeginMainFrame before the previous commit has
-// drawn.
-const char kDisableMainFrameBeforeDraw[] = "disable-main-frame-before-draw";
-
 // Disables sending the next BeginMainFrame before the previous commit
 // activates. Overrides the kEnableMainFrameBeforeActivation flag.
 const char kDisableMainFrameBeforeActivation[] =
     "disable-main-frame-before-activation";
 
 // Enables sending the next BeginMainFrame before the previous commit activates.
 const char kEnableMainFrameBeforeActivation[] =
     "enable-main-frame-before-activation";
 
 const char kEnableTopControlsPositionCalculation[] =
@@ skipping 83 matching lines @@
 const char kUIShowNonOccludingRects[] = "ui-show-nonoccluding-rects";
 
 // Prevents the layer tree unit tests from timing out.
 const char kCCLayerTreeTestNoTimeout[] = "cc-layer-tree-test-no-timeout";
 
 // Makes pixel tests write their output instead of read it.
 const char kCCRebaselinePixeltests[] = "cc-rebaseline-pixeltests";
 
 }  // namespace switches
 }  // namespace cc