Disable watchdog in debugger-pause-on-blocked-event-handler.html test

runTest function has parameter that enable watchdog for test. Watchdog terminates test after 20 seconds. When runTest function is set as load event listener then it get event as first parameter and enables watchdog.

BUG=498782
TBR=pfeldman@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1552593002

Cr-Commit-Position: refs/heads/master@{#367017}

third_party/WebKit/LayoutTests/inspector/sources/debugger/resources/pause-on-blocked-by-csp.js

@@ -16,4 +16,4 @@ function test()
     }
 }
 
-window.addEventListener("load", runTest);
+window.addEventListener("load", runTest.bind(null, false));