Convert CompilerTest over to use Compiler

Change-Id: Ie9ec6a021126f68acd3f6d35ebe73247b5cc360f
diff --git a/src/compiler.h b/src/compiler.h
index 1e5da6b..e779646 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -10,7 +10,10 @@
 
 class Compiler {
  public:
-  void Compile(std::vector<const DexFile*> class_path);
+  // Compile the DexFiles on a classpath. Returns a ClassLoader for
+  // the path used by the classes that were compiled. This ClassLoader
+  // can be used with FindClass to lookup a compiled class by name.
+  const ClassLoader* Compile(std::vector<const DexFile*> class_path);
 
  private:
   // Attempt to resolve all type, methods, fields, and strings