cc: Add command line flags for the various show rect debugging features.

cc/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/switches.h"
 
 namespace cc {
 namespace switches {
 
 // On platforms where checkerboards are used, prefer background colors instead
@@ skipping 11 matching lines @@
 // compositor.
 const char kEnablePinchInCompositor[]       = "enable-pinch-in-compositor";
 
 // Paint content on the compositor thread instead of the main thread.
 const char kImplSidePainting[] = "impl-side-painting";
 
 // When threaded compositing is turned on, wait until the entire frame has
 // content (i.e. jank) instead of showing checkerboards for missing content.
 const char kJankInsteadOfCheckerboard[] = "jank-instead-of-checkerboard";
 
+// Show rects in the HUD around layers whose properties have changed.
+const char kShowPropertyChangedRects[] = "show-property-changed-rects";
+
+// Show rects in the HUD around damage as it is recorded into each render
+// surface.
+const char kShowSurfaceDamageRects[] = "show-surface-damage-rects";
+
+// Show rects in the HUD around the screen-space transformed bounds of every
+// layer.
+const char kShowScreenSpaceRects[] = "show-screenspace-rects";
+
+// Show rects in the HUD around the screen-space transformed bounds of every
+// layer's replica, when they have one.
+const char kShowReplicaScreenSpaceRects[] = "show-replica-screenspace-rects";
+
+// Show rects in the HUD wherever something is known to be drawn opaque and is
+// considered occluding the pixels behind it.
+const char kShowOccludingRects[] = "show-occluding-rects";
+
 // Show metrics about overdraw in about:tracing recordings, such as the number
 // of pixels culled, and the number of pixels drawn, for each frame.
 const char kTraceOverdraw[] = "trace-overdraw";
 
 }  // namespace switches
 }  // namespace cc