cc: turn on strict paint property checking

cc/base/switches.cc

Index: cc/base/switches.cc
diff --git a/cc/base/switches.cc b/cc/base/switches.cc
index 9cf6d5c470e6f1d78f4237ed5eac80b608aabef7..b906586e2a5d6975a8fe7b86c1bb034956dcef6d 100644
--- a/cc/base/switches.cc
+++ b/cc/base/switches.cc
@@ -41,10 +41,6 @@ const char kTopControlsShowThreshold[] = "top-controls-show-threshold";
 // complete, such as --slow-down-raster-scale-factor=25.
 const char kSlowDownRasterScaleFactor[] = "slow-down-raster-scale-factor";
 
-// Check that property changes during paint do not occur.
-const char kStrictLayerPropertyChangeChecking[] =
-    "strict-layer-property-change-checking";
-
 // Ensures that the draw properties computed via the property trees match those
 // computed by CalcDrawProperties.
 const char kEnablePropertyTreeVerification[] =