HeadlessWebContents Observers for devtools clients attaching/detatching

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>
@@ skipping 23 matching lines @@
   class HEADLESS_EXPORT 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() {}
 
+    // Indicates that a DevTools client attached to this HeadlessWebContents
+    // instance.
+    virtual void DevToolsClientAttached() {}
+
+    // Indicates that a DevTools client detached from this HeadlessWebContents
+    // instance.
+    virtual void DevToolsClientDetached() {}
+
     // 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) {}
 
@@ skipping 108 matching lines @@
   gfx::Size window_size_;
   std::list<MojoService> mojo_services_;
   bool create_tab_socket_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(Builder);
 };
 
 }  // namespace headless
 
 #endif  // HEADLESS_PUBLIC_HEADLESS_WEB_CONTENTS_H_