lockPixels before calling getColorTable.

include/core/SkBitmap.h

Index: include/core/SkBitmap.h
diff --git a/include/core/SkBitmap.h b/include/core/SkBitmap.h
index 124525e249ea9ca2be333168fd8598acb822015d..ad185479801c8b71d66c7e7381412a3be5ab13e8 100644
--- a/include/core/SkBitmap.h
+++ b/include/core/SkBitmap.h
@@ -371,7 +371,9 @@ public:
      */
     SkGpuTexture* getTexture() const;
 
-    /** Return the bitmap's colortable (if any). Does not affect the colortable's
+    /** Return the bitmap's colortable, if it uses one (i.e. fConfig is
+        kIndex8_Config or kRLE_Index8_Config) and the pixels are locked.
+        Otherwise returns NULL. Does not affect the colortable's
         reference count.
     */
     SkColorTable* getColorTable() const { return fColorTable; }