DevTools: simplify the async instrumentation harness.

third_party/WebKit/LayoutTests/http/tests/inspector/sources/debugger/async-callstack-fetch.html

Index: third_party/WebKit/LayoutTests/http/tests/inspector/sources/debugger/async-callstack-fetch.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/inspector/sources/debugger/async-callstack-fetch.html b/third_party/WebKit/LayoutTests/http/tests/inspector/sources/debugger/async-callstack-fetch.html
index bb4ea84c2eced9abd7534a2c5eee27782263e9c0..548297931cc5ad2319f2aac136bf4fc6b597ca56 100644
--- a/third_party/WebKit/LayoutTests/http/tests/inspector/sources/debugger/async-callstack-fetch.html
+++ b/third_party/WebKit/LayoutTests/http/tests/inspector/sources/debugger/async-callstack-fetch.html
@@ -12,20 +12,17 @@ function testFunction()
 function doFetch()
 {
     fetch("../debugger/resources/script1.js").then(function chained1() {
+        debugger;
     }).then(function chained2() {
     }).then(function chained3() {
-        throw Error("thrown from chained3");
     }).then(function chained4() {
-    }).then(function chained5() {
-    }).then(function chained6() {
-    }).catch(function catchCallback() {
         debugger;
     });
 }
 
 var test = function()
 {
-    var totalDebuggerStatements = 1;
+    var totalDebuggerStatements = 2;
     var maxAsyncCallStackDepth = 4;
     InspectorTest.runAsyncCallStacksTest(totalDebuggerStatements, maxAsyncCallStackDepth);
 }