Support for drawing a debug border around animated layers

cc/base/switches.cc

Index: cc/base/switches.cc
diff --git a/cc/base/switches.cc b/cc/base/switches.cc
index 6768ef4515f3659756e764824944f9e72860634d..d3d2d1d631317a1d9f6bc5ad16b21930673c947e 100644
--- a/cc/base/switches.cc
+++ b/cc/base/switches.cc
@@ -97,6 +97,10 @@ const char kUIShowCompositedLayerBorders[] = "ui-show-layer-borders";
 const char kShowFPSCounter[] = "show-fps-counter";
 const char kUIShowFPSCounter[] = "ui-show-fps-counter";
 
+// Renders a border that represents the bounding box for the layer's animation.
+const char kShowLayerAnimationBounds[] = "show-layer-animation-bounds";
+const char kUIShowLayerAnimationBounds[] = "ui-show-layer-animation-bounds";
+
 // Show rects in the HUD around layers whose properties have changed.
 const char kShowPropertyChangedRects[] = "show-property-changed-rects";
 const char kUIShowPropertyChangedRects[] = "ui-show-property-changed-rects";