Add a web test for V8 code cache for module scripts

The newly added test and its expected.txt are mostly the same
as its classic version of same-origin-test.js, except for:
- notStreamedReason (it's always "module script"),
- tracing event name (v8.compileModule), and
- Set type=module.

Bug: 841466
Change-Id: Id64fdbb91ffd406a002c3e907065720e475d157b
Reviewed-on: https://chromium-review.googlesource.com/c/1475071
Commit-Queue: Hiroshige Hayashizaki <hiroshige@chromium.org>
Reviewed-by: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#633816}

third_party/blink/web_tests/SlowTests

@@ -88,14 +88,11 @@ crbug.com/450493 http/tests/devtools/csp/ [ Slow ]
 crbug.com/450493 http/tests/devtools/profiler/ [ Slow ]
 crbug.com/420008 http/tests/devtools/tracing/ [ Slow ]
 crbug.com/420008 virtual/threaded/http/tests/devtools/tracing/ [ Slow ]
-crbug.com/902685 http/tests/devtools/isolated-code-cache/same-origin-test.js [ Slow ]
-crbug.com/902685 http/tests/devtools/isolated-code-cache/cross-origin-test.js [ Slow ]
+crbug.com/902685 http/tests/devtools/isolated-code-cache/ [ Slow ]
+crbug.com/902685 virtual/site-isolated-code-cache/http/tests/devtools/isolated-code-cache/ [ Slow ]
+crbug.com/902685 virtual/not-site-per-process/http/tests/devtools/isolated-code-cache/ [ Slow ]
 crbug.com/902685 http/tests/devtools/wasm-isolated-code-cache/wasm-cache-test.js [ Slow ]
-crbug.com/902685 virtual/site-isolated-code-cache/http/tests/devtools/isolated-code-cache/same-origin-test.js [ Slow ]
-crbug.com/902685 virtual/site-isolated-code-cache/http/tests/devtools/isolated-code-cache/cross-origin-test.js [ Slow ]
 crbug.com/902685 virtual/wasm-site-isolated-code-cache/http/tests/devtools/wasm-isolated-code-cache/wasm-cache-test.js [ Slow ]
-crbug.com/902685 virtual/not-site-per-process/http/tests/devtools/isolated-code-cache/same-origin-test.js [ Slow ]
-crbug.com/902685 virtual/not-site-per-process/http/tests/devtools/isolated-code-cache/cross-origin-test.js [ Slow ]
 
 # Misc DevTools tests that are slow
 crbug.com/246190 [ Release ] http/tests/devtools/indexeddb/ [ Slow ]

third_party/blink/web_tests/http/tests/devtools/isolated-code-cache/resources/cross-origin-module-script.html

+<script type="module" src="http://localhost:8000/devtools/resources/v8-cache-script.cgi"></script>

third_party/blink/web_tests/http/tests/devtools/isolated-code-cache/resources/same-origin-module-script.html

+<script type="module" src="/devtools/resources/v8-cache-script.cgi"></script>

third_party/blink/web_tests/http/tests/devtools/isolated-code-cache/same-origin-module-test-expected.txt

+Tests V8 code cache for javascript resources
+
+--- Trace events related to code caches ------
+v8.compileModule Properties:
+{
+    data : {
+        columnNumber : 1
+        lineNumber : 1
+        notStreamedReason : "module script"
+        streamed : <boolean>
+        url : .../devtools/resources/v8-cache-script.cgi
+    }
+    endTime : <number>
+    startTime : <number>
+    type : "v8.compileModule"
+}
+Text details for v8.compileModule: v8-cache-script.cgi
+v8.compileModule Properties:
+{
+    data : {
+        columnNumber : 1
+        lineNumber : 1
+        notStreamedReason : "module script"
+        streamed : <boolean>
+        url : .../devtools/resources/v8-cache-script.cgi
+    }
+    endTime : <number>
+    startTime : <number>
+    type : "v8.compileModule"
+}
+Text details for v8.compileModule: v8-cache-script.cgi
+v8.compileModule Properties:
+{
+    data : {
+        cacheProduceOptions : "code"
+        columnNumber : 1
+        lineNumber : 1
+        notStreamedReason : "module script"
+        producedCacheSize : <number>
+        streamed : <boolean>
+        url : .../devtools/resources/v8-cache-script.cgi
+    }
+    endTime : <number>
+    startTime : <number>
+    type : "v8.compileModule"
+}
+Text details for v8.compileModule: v8-cache-script.cgi
+v8.compileModule Properties:
+{
+    data : {
+        cacheConsumeOptions : "code"
+        cacheRejected : false
+        columnNumber : 1
+        consumedCacheSize : <number>
+        lineNumber : 1
+        notStreamedReason : "module script"
+        streamed : <boolean>
+        url : .../devtools/resources/v8-cache-script.cgi
+    }
+    endTime : <number>
+    startTime : <number>
+    type : "v8.compileModule"
+}
+Text details for v8.compileModule: v8-cache-script.cgi
+v8.compileModule Properties:
+{
+    data : {
+        columnNumber : 1
+        lineNumber : 1
+        notStreamedReason : "module script"
+        streamed : <boolean>
+        url : .../devtools/resources/v8-cache-script.cgi
+    }
+    endTime : <number>
+    startTime : <number>
+    type : "v8.compileModule"
+}
+Text details for v8.compileModule: v8-cache-script.cgi
+v8.compileModule Properties:
+{
+    data : {
+        cacheConsumeOptions : "code"
+        cacheRejected : false
+        columnNumber : 1
+        consumedCacheSize : <number>
+        lineNumber : 1
+        notStreamedReason : "module script"
+        streamed : <boolean>
+        url : .../devtools/resources/v8-cache-script.cgi
+    }
+    endTime : <number>
+    startTime : <number>
+    type : "v8.compileModule"
+}
+Text details for v8.compileModule: v8-cache-script.cgi
+v8.compileModule Properties:
+{
+    data : {
+        cacheConsumeOptions : "code"
+        cacheRejected : false
+        columnNumber : 1
+        consumedCacheSize : <number>
+        lineNumber : 1
+        notStreamedReason : "module script"
+        streamed : <boolean>
+        url : .../devtools/resources/v8-cache-script.cgi
+    }
+    endTime : <number>
+    startTime : <number>
+    type : "v8.compileModule"
+}
+Text details for v8.compileModule: v8-cache-script.cgi
+-----------------------------------------------
+

third_party/blink/web_tests/http/tests/devtools/isolated-code-cache/same-origin-module-test.js

+// Copyright 2018 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+(async function() {
+  TestRunner.addResult(`Tests V8 code cache for javascript resources\n`);
+  await TestRunner.loadModule('performance_test_runner');
+  await TestRunner.showPanel('timeline');
+
+  // Clear browser cache to avoid any existing entries for the fetched
+  // scripts in the cache.
+  SDK.multitargetNetworkManager.clearBrowserCache();
+
+  // There are two scripts:
+  // [A] http://127.0.0.1:8000/devtools/resources/v8-cache-script.cgi
+  // [B] http://localhost:8000/devtools/resources/v8-cache-script.cgi
+
+  // An iframe that loads [A].
+  // The script is executed as a parser-inserted script,
+  // to keep the ScriptResource on the MemoryCache.
+  // ScriptResources for dynamically-inserted <script>s can be
+  // garbage-collected and thus removed from MemoryCache after its execution.
+  const scope = 'resources/same-origin-module-script.html';
+  // An iframe that loads [B].
+  const scopeCrossOrigin = 'resources/cross-origin-module-script.html';
+
+  TestRunner.addResult('--- Trace events related to code caches ------');
+  await PerformanceTestRunner.startTimeline();
+
+  // Load [A] thrice. With the current V8 heuristics (defined
+  // in third_party/blink/renderer/bindings/core/v8/v8_code_cache.cc) we produce
+  // cache on second fetch and consume it in the third fetch. This tests these
+  // heuristics.
+  // Note that addIframe() waits for iframe's load event, which waits for the
+  // <script> loading.
+  await TestRunner.addIframe(scope);
+  await TestRunner.addIframe(scope);
+  await TestRunner.addIframe(scope);
+
+  // Load [B]. Should not use the cached code.
+  await TestRunner.addIframe(scopeCrossOrigin);
+
+  // Load [A] again from MemoryCache. Should use cached code.
+  await TestRunner.addIframe(scope);
+
+  // Clear [A] from MemoryCache. Blink evicts previous Resource when a
+  // new request to the same URL but with different resource type is started.
+  // We fetch() to the URL of [A], and thus evicts the previous ScriptResource
+  // of [A].
+  await TestRunner.evaluateInPageAsync(
+      `fetch('/devtools/resources/v8-cache-script.cgi')`);
+
+  // Load [A] from Disk Cache. As we cleared [A] from MemoryCache, this
+  // doesn't hit MemoryCache, but still hits Disk Cache.
+  await TestRunner.addIframe(scope);
+
+  await PerformanceTestRunner.stopTimeline();
+  PerformanceTestRunner.printTimelineRecordsWithDetails(
+      TimelineModel.TimelineModel.RecordType.CompileModule);
+
+  TestRunner.addResult('-----------------------------------------------');
+  TestRunner.completeTest();
+})();