headless: Introduce a browser context

headless/test/headless_browser_test.h

 // Copyright 2016 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.
 
 #ifndef HEADLESS_TEST_HEADLESS_BROWSER_TEST_H_
 #define HEADLESS_TEST_HEADLESS_BROWSER_TEST_H_
 
 #include <memory>
 #include <string>
 
 #include "content/public/test/browser_test_base.h"
+#include "headless/public/domains/network.h"
+#include "headless/public/domains/page.h"
 #include "headless/public/headless_browser.h"
 #include "headless/public/headless_web_contents.h"
 
 namespace base {
 class RunLoop;
 }
 
 namespace headless {
 namespace runtime {
 class EvaluateResult;
 }
 class HeadlessDevToolsClient;
 
+// A utility class for asynchronously observing load events.
+class LoadObserver : public page::Observer, public network::Observer {
+ public:
+  LoadObserver(HeadlessDevToolsClient* devtools_client, base::Closure callback);
+  ~LoadObserver() override;
+
+  // page::Observer implementation:
+  void OnLoadEventFired(const page::LoadEventFiredParams& params) override;
+
+  // network::Observer implementation:
+  void OnResponseReceived(
+      const network::ResponseReceivedParams& params) override;
+
+  bool navigation_succeeded() const { return navigation_succeeded_; }
+
+ private:
+  base::Closure callback_;
+  HeadlessDevToolsClient* devtools_client_;  // Not owned.
+
+  bool navigation_succeeded_;
+
+  DISALLOW_COPY_AND_ASSIGN(LoadObserver);
+};
+
 // Base class for tests which require a full instance of the headless browser.
 class HeadlessBrowserTest : public content::BrowserTestBase {
  public:
   // Notify that an asynchronous test is now complete and the test runner should
   // exit.
   void FinishAsynchronousTest();
 
  protected:
   HeadlessBrowserTest();
   ~HeadlessBrowserTest() override;
@@ skipping 54 matching lines @@
  protected:
   void RunTest();
 
   HeadlessWebContents* web_contents_;
   std::unique_ptr<HeadlessDevToolsClient> devtools_client_;
 };
 
 }  // namespace headless
 
 #endif  // HEADLESS_TEST_HEADLESS_BROWSER_TEST_H_