DevTools: [remote debugging] emit Inspector.detached protocol message upon connectin termination.

content/public/browser/devtools_client_host.h

Index: content/public/browser/devtools_client_host.h
diff --git a/content/public/browser/devtools_client_host.h b/content/public/browser/devtools_client_host.h
index 310627ee00cc0661c5e13ef82522c2b9891351b1..98a62a59acfd6e05514013f5c52536cbda4cc851 100644
--- a/content/public/browser/devtools_client_host.h
+++ b/content/public/browser/devtools_client_host.h
@@ -42,6 +42,10 @@ class CONTENT_EXPORT DevToolsClientHost {
   // Invoked when the contents are replaced by another contents.
   virtual void ContentsReplaced(WebContents* new_contents) = 0;
 
+  // Called to notify client that it has been kicked out by some other client
+  // with greater priority.
+  virtual void ReplacedWithAnotherClient() = 0;
+
   // Creates a DevToolsClientHost for a WebContents containing the default
   // DevTools frontend implementation.
   static DevToolsClientHost* CreateDevToolsFrontendHost(