diff --git a/core/java/android/view/HardwareRenderer.java b/core/java/android/view/HardwareRenderer.java
index 8584bf2..28541fe 100644
--- a/core/java/android/view/HardwareRenderer.java
+++ b/core/java/android/view/HardwareRenderer.java
@@ -20,7 +20,7 @@
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Rect;
-import android.os.SystemClock;
+import android.os.*;
 import android.util.EventLog;
 import android.util.Log;
 
@@ -256,6 +256,7 @@
 
     @SuppressWarnings({"deprecation"})
     static abstract class GlRenderer extends HardwareRenderer {
+        // These values are not exposed in our EGL APIs
         private static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
         private static final int EGL_SURFACE_TYPE = 0x3033;
         private static final int EGL_SWAP_BEHAVIOR_PRESERVED_BIT = 0x0400;
@@ -290,7 +291,7 @@
         GlRenderer(int glVersion, boolean translucent) {
             mGlVersion = glVersion;
             mTranslucent = translucent;
-            final String dirtyProperty = System.getProperty(RENDER_DIRTY_REGIONS_PROPERTY, "true");
+            final String dirtyProperty = SystemProperties.get(RENDER_DIRTY_REGIONS_PROPERTY, "true");
             //noinspection PointlessBooleanExpression,ConstantConditions
             mDirtyRegions = RENDER_DIRTY_REGIONS && "true".equalsIgnoreCase(dirtyProperty);
         }
diff --git a/libs/hwui/Debug.h b/libs/hwui/Debug.h
index 14471bc..f74238e 100644
--- a/libs/hwui/Debug.h
+++ b/libs/hwui/Debug.h
@@ -26,7 +26,7 @@
 // Turn on to enable memory usage summary on each frame
 #define DEBUG_MEMORY_USAGE 0
 
-// Turn on to enable layers debugging when renderered as regions
+// Turn on to enable layers debugging when rendered as regions
 #define DEBUG_LAYERS_AS_REGIONS 0
 
 // Turn on to display debug info about vertex/fragment shaders
@@ -35,7 +35,7 @@
 // Turn on to display info about layers
 #define DEBUG_LAYERS 0
 
-// Turn on to display debug infor about 9patch objects
+// Turn on to display debug info about 9patch objects
 #define DEBUG_PATCHES 0
 // Turn on to display vertex and tex coords data about 9patch objects
 // This flag requires DEBUG_PATCHES to be turned on