Reject deriveBits() for PBKDF2 when given a length of 0.

third_party/WebKit/LayoutTests/crypto/subtle/pbkdf2/deriveBits-failures.html

Index: third_party/WebKit/LayoutTests/crypto/subtle/pbkdf2/deriveBits-failures.html
diff --git a/third_party/WebKit/LayoutTests/crypto/subtle/pbkdf2/deriveBits-failures.html b/third_party/WebKit/LayoutTests/crypto/subtle/pbkdf2/deriveBits-failures.html
index 71052f4926cd0f6945d3c36708d7cfcf24b17128..cbe06f122bda39211b7c80c4f088c0e8bd24e720 100644
--- a/third_party/WebKit/LayoutTests/crypto/subtle/pbkdf2/deriveBits-failures.html
+++ b/third_party/WebKit/LayoutTests/crypto/subtle/pbkdf2/deriveBits-failures.html
@@ -64,6 +64,28 @@ importPbkdf2Key().then(function() {
     return expectFailure(
         "Deriving using iterations=-10...",
         crypto.subtle.deriveBits(algorithm, pbkdf2Key, 16));
+}).then(function() {
+    var algorithm = {
+        name: "PBKDF2",
+        salt: asciiToUint8Array("salt"),
+        iterations: 1024,
+        hash: "SHA-1" 
+    };
+
+    return expectFailure(
+        "Deriving using length 0...",
+        crypto.subtle.deriveBits(algorithm, pbkdf2Key, 0));
+}).then(function() {
+    var algorithm = {
+        name: "PBKDF2",
+        salt: asciiToUint8Array("salt"),
+        iterations: 1024,
+        hash: "SHA-1" 
+    };
+
+    return expectFailure(
+        "Deriving using length -10...",
+        crypto.subtle.deriveBits(algorithm, pbkdf2Key, -10));
 }).then(finishJSTest, failAndFinishJSTest);
 
 </script>