Make testharness.js tests fail on uncaught exceptions

third_party/WebKit/LayoutTests/http/tests/serviceworker/fetch-canvas-tainting-expected.txt

Index: third_party/WebKit/LayoutTests/http/tests/serviceworker/fetch-canvas-tainting-expected.txt
diff --git a/third_party/WebKit/LayoutTests/http/tests/serviceworker/fetch-canvas-tainting-expected.txt b/third_party/WebKit/LayoutTests/http/tests/serviceworker/fetch-canvas-tainting-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4a77e1e51f57469758f566f2bb8c1becc6806471
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/http/tests/serviceworker/fetch-canvas-tainting-expected.txt
@@ -0,0 +1,10 @@
+CONSOLE ERROR: Image from origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: Image from origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: Image from origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: Credentials flag is 'true', but the 'Access-Control-Allow-Credentials' header is ''. It must be 'true' to allow credentials. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: Image from origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access. The response had HTTP status code 401.
+CONSOLE ERROR: Image from origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: Credentials flag is 'true', but the 'Access-Control-Allow-Credentials' header is ''. It must be 'true' to allow credentials. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+CONSOLE ERROR: Image from origin 'http://localhost:8000' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:8000' is therefore not allowed access.
+ This is a testharness.js-based test.
+PASS Verify canvas tainting of fetched image in a Service Worker 
+Harness: the test ran to completion.
+