Kill constants.h and fix some copyright headers.

Change-Id: I51c04d731d6de035328781d8ac134ad6fcf49897
diff --git a/src/check_jni.cc b/src/check_jni.cc
index cc14935..67b1c3e 100644
--- a/src/check_jni.cc
+++ b/src/check_jni.cc
@@ -567,10 +567,10 @@
 
   enum InstanceKind {
     kClass,
-        kDirectByteBuffer,
-        kObject,
-        kString,
-        kThrowable,
+    kDirectByteBuffer,
+    kObject,
+    kString,
+    kThrowable,
   };
 
   /*