code review fixes

@@ -101,7 +101,7 @@ const precompute = function() {
     decTable[i] = decTable[i].slice(0);
   }
   return _tables;
-}
+};
 
 let tables;
 
@@ -367,12 +367,11 @@ export class AsyncStream extends Stream {
 }
 
 // the maximum number of bytes to process at one time
-const decrypterStep = 4 * 8000;
+const DecrypterStep = 4 * 8000;
 
-export class Decrypter extends Stream {
+export class Decrypter {
   constructor(encrypted, key, initVector, done) {
-    super(Stream);
-    let step = decrypterStep;
+    let step = DecrypterStep;
     let encrypted32 = new Int32Array(encrypted.buffer);
     let decrypted = new Uint8Array(encrypted.byteLength);
     let i = 0;
@@ -409,7 +408,7 @@ export class Decrypter extends Stream {
   }
 }
 
-Decrypter.STEP = decrypterStep;
+Decrypter.STEP = DecrypterStep;
 
 export default {
   decrypt,

@@ -106,24 +106,20 @@ QUnit.test('asynchronously decrypts a 4-word block', function() {
   let key = new Uint32Array([0, 0, 0, 0]);
   let initVector = key;
   // the string "howdy folks" encrypted
-  let encrypted = new Uint8Array([
-    0xce, 0x90, 0x97, 0xd0,
-    0x08, 0x46, 0x4d, 0x18,
-    0x4f, 0xae, 0x01, 0x1c,
-    0x82, 0xa8, 0xf0, 0x67
-  ]);
+  let encrypted = new Uint8Array([0xce, 0x90, 0x97, 0xd0,
+                                  0x08, 0x46, 0x4d, 0x18,
+                                  0x4f, 0xae, 0x01, 0x1c,
+                                  0x82, 0xa8, 0xf0, 0x67]);
   let decrypted;
-  let decrypter = new Decrypter(
-    encrypted,
-    key,
-    initVector,
-    function(error, result) {
-      if (error) {
-        throw new Error(error);
-      }
-      decrypted = result;
-    }
-  );
+  let decrypter = new Decrypter(encrypted,
+                                key,
+                                initVector,
+                                function(error, result) {
+                                  if (error) {
+                                    throw new Error(error);
+                                  }
+                                  decrypted = result;
+                                });
 
   QUnit.ok(!decrypted, 'asynchronously decrypts');
   this.clock.tick(decrypter.asyncStream_.delay * 2);
@@ -137,14 +133,12 @@ QUnit.test('asynchronously decrypts a 4-word block', function() {
 QUnit.test('breaks up input greater than the step value', function() {
   let encrypted = new Int32Array(Decrypter.STEP + 4);
   let done = false;
-  let decrypter = new Decrypter(
-    encrypted,
-    new Uint32Array(4),
-    new Uint32Array(4),
-    function() {
-      done = true;
-    }
-  );
+  let decrypter = new Decrypter(encrypted,
+                                new Uint32Array(4),
+                                new Uint32Array(4),
+                                function() {
+                                  done = true;
+                                });
 
   this.clock.tick(decrypter.asyncStream_.delay * 2);
   QUnit.ok(!done, 'not finished after two ticks');