DevTools: response writers need to post to the UI while sending into streams.

content/shell/browser/shell_devtools_frontend.h

 // Copyright 2013 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 CONTENT_SHELL_BROWSER_SHELL_DEVTOOLS_FRONTEND_H_
 #define CONTENT_SHELL_BROWSER_SHELL_DEVTOOLS_FRONTEND_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "content/public/browser/devtools_agent_host.h"
 #include "content/public/browser/devtools_frontend_host.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "net/url_request/url_fetcher_delegate.h"
 
+namespace base {
+class Value;
+}
+
 namespace content {
 
 class RenderViewHost;
 class Shell;
 class WebContents;
 
 class ShellDevToolsFrontend : public WebContentsObserver,
                               public DevToolsFrontendHost::Delegate,
                               public DevToolsAgentHostClient,
                               public net::URLFetcherDelegate {
  public:
   static ShellDevToolsFrontend* Show(WebContents* inspected_contents);
 
   void Activate();
   void Focus();
   void InspectElementAt(int x, int y);
   void Close();
 
   void DisconnectFromTarget();
 
   Shell* frontend_shell() const { return frontend_shell_; }
 
+  void CallClientFunction(const std::string& function_name,
+                          const base::Value* arg1,
+                          const base::Value* arg2,
+                          const base::Value* arg3);
+
  protected:
   ShellDevToolsFrontend(Shell* frontend_shell, DevToolsAgentHost* agent_host);
   ~ShellDevToolsFrontend() override;
 
   // content::DevToolsAgentHostClient implementation.
   void AgentHostClosed(DevToolsAgentHost* agent_host, bool replaced) override;
   void DispatchProtocolMessage(DevToolsAgentHost* agent_host,
                                const std::string& message) override;
   void AttachTo(WebContents* inspected_contents);
 
  private:
   // WebContentsObserver overrides
   void RenderViewCreated(RenderViewHost* render_view_host) override;
   void DidNavigateMainFrame(
       const LoadCommittedDetails& details,
       const FrameNavigateParams& params) override;
   void WebContentsDestroyed() override;
 
   // content::DevToolsFrontendHost::Delegate implementation.
   void HandleMessageFromDevToolsFrontend(const std::string& message) override;
   void HandleMessageFromDevToolsFrontendToBackend(
       const std::string& message) override;
 
   // net::URLFetcherDelegate overrides.
   void OnURLFetchComplete(const net::URLFetcher* source) override;
 
+  void SendMessageAck(int request_id,
+                      const base::Value* arg1);
+
   Shell* frontend_shell_;
   scoped_refptr<DevToolsAgentHost> agent_host_;
   scoped_ptr<DevToolsFrontendHost> frontend_host_;
   using PendingRequestsMap = std::map<const net::URLFetcher*, int>;
   PendingRequestsMap pending_requests_;
+  base::WeakPtrFactory<ShellDevToolsFrontend> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellDevToolsFrontend);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_BROWSER_SHELL_DEVTOOLS_FRONTEND_H_