[DevTools] Make some breakpoints-related tests work better with true setTimeout 0

Currently SetTimeout(..., 0) is clamped up to 1ms in Chromium while which
is not supposed to be in the spec. The Speedometer2 performance can boost
~1% on Windows without it based on Pinpoint perf. This CL is intended
to fix the devtool tests that become flaky with

https://chromium-review.googlesource.com/c/chromium/src/+/2578703

Bug: 402694
Change-Id: I1ea3747aa97ea8e40ef8d5e7c3cc997ea687bcd2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2603037Reviewed-by: Philip Jägenstedt <foolip@chromium.org>
Commit-Queue: Wanming Lin <wanming.lin@intel.com>
Cr-Commit-Position: refs/heads/master@{#841917}

third_party/blink/web_tests/http/tests/devtools/sources/debugger-breakpoints/set-breakpoint.js

@@ -21,7 +21,8 @@
         SourcesTestRunner.waitUntilPaused(didPause);
         SourcesTestRunner.createNewBreakpoint(currentSourceFrame, 13, '', true)
             .then(() => SourcesTestRunner.waitBreakpointSidebarPane())
-            .then(() => SourcesTestRunner.runTestFunction());
+            .then(() => setTimeout(() =>
+                SourcesTestRunner.runTestFunction(), 1));
       }
 
       async function didPause(callFrames) {

third_party/blink/web_tests/http/tests/devtools/sources/debugger-breakpoints/set-conditional-breakpoint.js

@@ -22,7 +22,8 @@
         SourcesTestRunner
             .createNewBreakpoint(currentSourceFrame, 13, 'true', true)
             .then(() => SourcesTestRunner.waitBreakpointSidebarPane())
-            .then(() => SourcesTestRunner.runTestFunction());
+            .then(() => setTimeout(() =>
+                SourcesTestRunner.runTestFunction(), 1));
       }
 
       async function didPause(callFrames) {

third_party/blink/web_tests/http/tests/devtools/sources/debugger-ui/script-formatter-breakpoints-2.js

@@ -40,7 +40,7 @@
 
       function evaluateF2() {
         SourcesTestRunner.waitUntilPaused(pausedInF2);
-        TestRunner.evaluateInPageWithTimeout('f2()');
+        setTimeout(() => TestRunner.evaluateInPageAnonymously('f2()'), 1);
       }
 
       async function pausedInF2(callFrames) {

third_party/blink/web_tests/http/tests/devtools/sources/debugger-ui/script-formatter-breakpoints-3.js

@@ -39,7 +39,7 @@
 
       function evaluateF2() {
         SourcesTestRunner.waitUntilPaused(pausedInF2);
-        TestRunner.evaluateInPageWithTimeout('f2()');
+        setTimeout(() => TestRunner.evaluateInPageAnonymously('f2()'), 1);
       }