cc: Allow sending BeginMainFrame before draw or activation

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[] =
     "enable-top-controls-position-calculation";
 
 // The height of the movable top controls.
 const char kTopControlsHeight[] = "top-controls-height";
 
 // Percentage of the top controls need to be hidden before they will auto hide.
 const char kTopControlsHideThreshold[] = "top-controls-hide-threshold";
 
 // Percentage of the top controls need to be shown before they will auto show.
@@ skipping 81 matching lines @@
 
 // Makes pixel tests write their output instead of read it.
 const char kCCRebaselinePixeltests[] = "cc-rebaseline-pixeltests";
 
 // Disable touch hit testing in the compositor.
 const char kDisableCompositorTouchHitTesting[] =
     "disable-compositor-touch-hit-testing";
 
 }  // namespace switches
 }  // namespace cc