DevTools: disable compilation cache for inspector tests to reduce flakiness.

components/test_runner/test_runner.cc

 // Copyright 2014 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.
 
 #include "components/test_runner/test_runner.h"
 
 #include <stddef.h>
 #include <limits>
 #include <utility>
 
@@ skipping 1608 matching lines @@
 void TestRunner::SetDelegate(WebTestDelegate* delegate) {
   delegate_ = delegate;
   mock_content_settings_client_->SetDelegate(delegate);
   spellcheck_->SetDelegate(delegate);
   if (speech_recognizer_)
     speech_recognizer_->SetDelegate(delegate);
 }
 
 void TestRunner::SetMainView(WebView* web_view) {
   main_view_ = web_view;
+  if (disable_v8_cache_)
+    SetV8CacheDisabled(true);
 }
 
 void TestRunner::Reset() {
   is_web_platform_tests_mode_ = false;
   will_navigate_ = false;
   top_loading_frame_ = nullptr;
   layout_test_runtime_flags_.Reset();
   mock_screen_orientation_client_->ResetData();
   drag_image_.reset();
 
@@ skipping 319 matching lines @@
 }
 
 midi::mojom::Result TestRunner::midiAccessorResult() {
   return midi_accessor_result_;
 }
 
 void TestRunner::ClearDevToolsLocalStorage() {
   delegate_->ClearDevToolsLocalStorage();
 }
 
+void TestRunner::SetV8CacheDisabled(bool disabled) {
+  if (!main_view_) {
+    disable_v8_cache_ = disabled;
+    return;
+  }
+  main_view_->settings()->setV8CacheOptions(disabled ?
+      blink::WebSettings::V8CacheOptionsNone :
+      blink::WebSettings::V8CacheOptionsDefault);
+}
+
 void TestRunner::ShowDevTools(const std::string& settings,
                               const std::string& frontend_url) {
   delegate_->ShowDevTools(settings, frontend_url);
 }
 
 class WorkItemBackForward : public TestRunner::WorkItem {
  public:
   WorkItemBackForward(int distance) : distance_(distance) {}
 
   bool Run(WebTestDelegate* delegate, WebView*) override {
@@ skipping 802 matching lines @@
 
 void TestRunner::NotifyDone() {
   if (layout_test_runtime_flags_.wait_until_done() && !topLoadingFrame() &&
       !will_navigate_ && work_queue_.is_empty())
     delegate_->TestFinished();
   layout_test_runtime_flags_.set_wait_until_done(false);
   OnLayoutTestRuntimeFlagsChanged();
 }
 
 }  // namespace test_runner