HeadlessWebContents:Observer to observe render process exit status

headless/public/headless_web_contents.h

 // Copyright 2015 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_PUBLIC_HEADLESS_WEB_CONTENTS_H_
 #define HEADLESS_PUBLIC_HEADLESS_WEB_CONTENTS_H_
 
 #include <list>
 #include <string>
 #include <utility>
 
 #include "base/callback.h"
 #include "base/macros.h"
+#include "base/process/kill.h"
 #include "headless/public/headless_export.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "ui/gfx/geometry/size.h"
 #include "url/gurl.h"
 
 namespace headless {
 class HeadlessBrowserContextImpl;
 class HeadlessBrowserImpl;
 class HeadlessDevToolsTarget;
 
 // Class representing contents of a browser tab. Should be accessed from browser
 // main thread.
 class HEADLESS_EXPORT HeadlessWebContents {
  public:
   class Builder;
 
   virtual ~HeadlessWebContents() {}
 
   class Observer {
    public:
     // All the following notifications will be called on browser main thread.
 
     // Indicates that this HeadlessWebContents instance is now ready to be
     // inspected using a HeadlessDevToolsClient.
     //
     // TODO(altimin): Support this event for pages that aren't created by us.
     virtual void DevToolsTargetReady() {}
 
+    // This method is invoked when the process of the observed RenderProcessHost
+    // exits (either normally or with a crash). To determine if the process
+    // closed normally or crashed, examine the |status| parameter.
+    //
+    // If |status| is TERMINATION_STATUS_LAUNCH_FAILED then |exit_code| will
+    // contain a platform specific launch failure error code. Otherwise, it will
+    // contain the exit code for the process.
+    virtual void RenderProcessExited(base::TerminationStatus status,
+                                     int exit_code) {}
+
    protected:
     Observer() {}
     virtual ~Observer() {}
 
    private:
     DISALLOW_COPY_AND_ASSIGN(Observer);
   };
 
   // Add or remove an observer to receive events from this WebContents.
   // |observer| must outlive this class or be removed prior to being destroyed.
@@ skipping 83 matching lines @@
   GURL initial_url_ = GURL("about:blank");
   gfx::Size window_size_;
   std::list<MojoService> mojo_services_;
 
   DISALLOW_COPY_AND_ASSIGN(Builder);
 };
 
 }  // namespace headless
 
 #endif  // HEADLESS_PUBLIC_HEADLESS_WEB_CONTENTS_H_