Headless: make URLRequestDispatcher aware of navigations

headless/app/headless_shell.h

Index: headless/app/headless_shell.h
diff --git a/headless/app/headless_shell.h b/headless/app/headless_shell.h
new file mode 100644
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+++ b/headless/app/headless_shell.h
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+// Copyright 2017 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 "base/memory/weak_ptr.h"
+#include "headless/app/shell_navigation_request.h"
+#include "headless/public/devtools/domains/emulation.h"
+#include "headless/public/devtools/domains/inspector.h"
+#include "headless/public/devtools/domains/page.h"
+#include "headless/public/devtools/domains/runtime.h"
+#include "headless/public/headless_browser.h"
+#include "headless/public/headless_devtools_client.h"
+#include "headless/public/headless_web_contents.h"
+#include "headless/public/util/deterministic_dispatcher.h"
+#include "net/base/file_stream.h"
+
+namespace headless {
+
+// An application which implements a simple headless browser.
+class HeadlessShell : public HeadlessWebContents::Observer,
+                      emulation::ExperimentalObserver,
+                      inspector::ExperimentalObserver,
+                      page::ExperimentalObserver {
+ public:
+  HeadlessShell();
+  ~HeadlessShell() override;
+
+  // HeadlessWebContents::Observer implementation:
+  void DevToolsTargetReady() override;
+  void OnTargetCrashed(const inspector::TargetCrashedParams& params) override;
+
+  // emulation::Observer implementation:
+  void OnVirtualTimeBudgetExpired(
+      const emulation::VirtualTimeBudgetExpiredParams& params) override;
+
+  // page::Observer implementation:
+  void OnLoadEventFired(const page::LoadEventFiredParams& params) override;
+  void OnNavigationRequested(
+      const headless::page::NavigationRequestedParams& params) override;
+
+  void OnStart(HeadlessBrowser* browser);
+  void Shutdown();
+
+  void FetchTimeout();
+
+  void PollReadyState();
+
+  void OnReadyState(std::unique_ptr<runtime::EvaluateResult> result);
+
+  void OnPageReady();
+
+  void FetchDom();
+
+  void OnDomFetched(std::unique_ptr<runtime::EvaluateResult> result);
+
+  void InputExpression();
+
+  void OnExpressionResult(std::unique_ptr<runtime::EvaluateResult> result);
+
+  void CaptureScreenshot();
+
+  void OnScreenshotCaptured(
+      std::unique_ptr<page::CaptureScreenshotResult> result);
+
+  void OnScreenshotFileOpened(
+      std::unique_ptr<page::CaptureScreenshotResult> result,
+      const base::FilePath file_name,
+      const int open_result);
+
+  void OnScreenshotFileWritten(const base::FilePath file_name,
+                               const int length,
+                               const int write_result);
+
+  void OnScreenshotFileClosed(const int close_result);
+
+  bool RemoteDebuggingEnabled() const;
+
+  HeadlessDevToolsClient* devtools_client() const {
+    return devtools_client_.get();
+  }
+
+ private:
+  GURL url_;
+  HeadlessBrowser* browser_;  // Not owned.
+  std::unique_ptr<HeadlessDevToolsClient> devtools_client_;
+  HeadlessWebContents* web_contents_;
+  bool processed_page_ready_;
+  std::unique_ptr<net::FileStream> screenshot_file_stream_;
+  HeadlessBrowserContext* browser_context_;
+  std::unique_ptr<DeterministicDispatcher> deterministic_dispatcher_;
+  base::WeakPtrFactory<HeadlessShell> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(HeadlessShell);
+};
+
+}  // namespace headless