Fix the flaky test by ensuring the image used by <input type=image> is loaded.

third_party/WebKit/LayoutTests/fast/events/domactivate-sets-underlying-click-event-as-handled.html

Index: third_party/WebKit/LayoutTests/fast/events/domactivate-sets-underlying-click-event-as-handled.html
diff --git a/third_party/WebKit/LayoutTests/fast/events/domactivate-sets-underlying-click-event-as-handled.html b/third_party/WebKit/LayoutTests/fast/events/domactivate-sets-underlying-click-event-as-handled.html
index 649c9af5820f5291b7b4a53adede95defcdfb8cf..d5106257a3031fe579165402a34e31c139e20e02 100644
--- a/third_party/WebKit/LayoutTests/fast/events/domactivate-sets-underlying-click-event-as-handled.html
+++ b/third_party/WebKit/LayoutTests/fast/events/domactivate-sets-underlying-click-event-as-handled.html
@@ -5,7 +5,7 @@ element. The anchor shouldn't be activated (i.e. you shouldn't see any "anchor a
     <form action="javascript:formSubmitted()">
         <input type=text>
         <input type=submit>
-        <input type=image>
+        <input src="resources/abe.png" type=image>
         <button>button</button>
         <input type=reset>
         <button type=reset>button reset</button>
@@ -30,43 +30,45 @@ function anchorActivated() { log("anchor activated\n"); }
 
 document.forms[0].children[0].value = "blah";
 
-for (var i=0; i < document.forms[0].children.length; i++) {
-    var element = document.forms[0].children[i];
+document.querySelector("input[type=image]").addEventListener("load", function() {

[hayato, 2015/09/30 08:12:09]

The diff is difficult to read. It just wraps the entire part with the load event
listener.

+    for (var i=0; i < document.forms[0].children.length; i++) {
+        var element = document.forms[0].children[i];
 
-    element.addEventListener("click", function () {
-        log("Activated " + this + " type=" + this.type);
-    }, false);
+        element.addEventListener("click", function () {
+            log("Activated " + this + " type=" + this.type);
+        }, false);
 
-    if (!window.eventSender)
-        continue;
+        if (!window.eventSender)
+            continue;
+
+        if (element.type == "text") {
+            log("Focusing " + element + " type=" + element.type + " and pressing enter");
+            element.focus();
+            eventSender.keyDown("\n");
+            continue;
+        }
+
+        eventSender.mouseMoveTo(element.offsetLeft + element.clientWidth / 2, element.offsetTop + element.clientHeight / 2);
+        eventSender.mouseDown();
+        eventSender.mouseUp();
+
+        if (element.type == "radio" || element.type == "checkbox")
+            continue;
 
-    if (element.type == "text") {
         log("Focusing " + element + " type=" + element.type + " and pressing enter");
         element.focus();
         eventSender.keyDown("\n");
-        continue;
     }
 
-    eventSender.mouseMoveTo(element.offsetLeft + element.clientWidth / 2, element.offsetTop + element.clientHeight / 2);
-    eventSender.mouseDown();
-    eventSender.mouseUp();
-
-    if (element.type == "radio" || element.type == "checkbox")
-        continue;
-
-    log("Focusing " + element + " type=" + element.type + " and pressing enter");
-    element.focus();
-    eventSender.keyDown("\n");
-}
-
-if (window.eventSender) {
-    var details = document.querySelector("details");
-    eventSender.mouseMoveTo(details.offsetLeft + details.clientWidth / 2, details.offsetTop + details.clientHeight / 2);
-    eventSender.mouseDown();
-    eventSender.mouseUp();
-    log("\nThe details element was " + (details.open ? "" : "not ") + "opened");
-}
+    if (window.eventSender) {
+        var details = document.querySelector("details");
+        eventSender.mouseMoveTo(details.offsetLeft + details.clientWidth / 2, details.offsetTop + details.clientHeight / 2);
+        eventSender.mouseDown();
+        eventSender.mouseUp();
+        log("\nThe details element was " + (details.open ? "" : "not ") + "opened");
+    }
 
-if (window.testRunner)
-    document.querySelector("a").style.display = "none";
+    if (window.testRunner)
+        document.querySelector("a").style.display = "none";
+});
 </script>