Fix out-of-memory crashes related to ArrayBuffer allocation

third_party/WebKit/LayoutTests/crypto/subtle/digest-arraybuffer-oom.html

Index: third_party/WebKit/LayoutTests/crypto/subtle/digest-arraybuffer-oom.html
diff --git a/third_party/WebKit/LayoutTests/crypto/subtle/digest-arraybuffer.html b/third_party/WebKit/LayoutTests/crypto/subtle/digest-arraybuffer-oom.html
similarity index 55%
copy from third_party/WebKit/LayoutTests/crypto/subtle/digest-arraybuffer.html
copy to third_party/WebKit/LayoutTests/crypto/subtle/digest-arraybuffer-oom.html
index 0bb6998f14989beab60be52e8da82f0452463e0b..8a996e9a949b2c55bc6d3a2102c05a2f90b7b8a2 100644
--- a/third_party/WebKit/LayoutTests/crypto/subtle/digest-arraybuffer.html
+++ b/third_party/WebKit/LayoutTests/crypto/subtle/digest-arraybuffer-oom.html
@@ -9,7 +9,7 @@
 <div id="console"></div>
 
 <script>
-description("Tests the digest() method using ArrayBuffer");
+description("Tests the digest() method using ArrayBuffer, with a memory allocation failure.");
 
 jsTestIsAsync = true;
 
@@ -17,13 +17,13 @@ var algorithmName = "sha-256";
 var inputHex = "00";
 var expectedOutputHex = "6e340b9cffb37a989ca544e6bb780a2c78901d3fb33738768511a30617afa01d";
 
-// Most of the crypto LayouTests use ArrayBufferView for data input. This one
-// passes an ArrayBuffer instead.
 var input = hexStringToUint8Array(inputHex).buffer;
 
-crypto.subtle.digest({name : algorithmName}, input).then(function(result) {
-    bytesShouldMatchHexString("sha-256 of [0]", expectedOutputHex, result);
-}).then(finishJSTest, failAndFinishJSTest);
+if (window.internals) {
+    internals.fakeOutOfMemoryForNextArrayBufferAllocation();

[Stephen White, 2015/10/29 16:29:52]

Nice!

+    // Test succeeds if promise is rejected.
+    crypto.subtle.digest({name : algorithmName}, input).then(failAndFinishJSTest, finishJSTest);
+}
 
 </script>