cc: Add strict layer property change checking and handle bounds changes during paint.

cc/base/switches.cc

Index: cc/base/switches.cc
diff --git a/cc/base/switches.cc b/cc/base/switches.cc
index 808b5a9f883f4db3e927fd6cc31fe357565a32bd..cf2e6c5ddc4809ff4bb3ad21690886242a14cf87 100644
--- a/cc/base/switches.cc
+++ b/cc/base/switches.cc
@@ -86,6 +86,10 @@ const char kDisablePinchZoomScrollbars[]    = "disable-pinch-zoom-scrollbars";
 // Requires --enable-compositor-frame-message.
 const char kCompositeToMailbox[] = "composite-to-mailbox";
 
+// Check that property changes during paint do not occur.
+const char kStrictLayerPropertyChangeChecking[] =
+    "strict-layer-property-change-checking";
+
 const char kEnablePartialSwap[] = "enable-partial-swap";
 // Disable partial swap which is needed for some OpenGL drivers / emulators.
 const char kUIDisablePartialSwap[] = "ui-disable-partial-swap";