Implement VMClassLoader's native methods.

Change-Id: I6e617f415e54ce29c3a0a470b58e79d3aaa0a4bf
diff --git a/src/dex_file.h b/src/dex_file.h
index 9ebcce2..359825a 100644
--- a/src/dex_file.h
+++ b/src/dex_file.h
@@ -911,7 +911,7 @@
   // The size of the underlying memory allocation in bytes.
   size_t length_;
 
-  // Typically the dex file name when availble, alternatively some identifying string.
+  // Typically the dex file name when available, alternatively some identifying string.
   //
   // The ClassLinker will use this to match DexFiles the boot class
   // path to DexCache::GetLocation when loading from an image.