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

content/shell/browser/shell_devtools_frontend.h

Index: content/shell/browser/shell_devtools_frontend.h
diff --git a/content/shell/browser/shell_devtools_frontend.h b/content/shell/browser/shell_devtools_frontend.h
index 95325e9e625f321c2c4145a817b2ee5a4df2851e..140801b50859c847cc207698bb940188a9c49ffe 100644
--- a/content/shell/browser/shell_devtools_frontend.h
+++ b/content/shell/browser/shell_devtools_frontend.h
@@ -9,11 +9,16 @@
 #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;
@@ -36,6 +41,11 @@ class ShellDevToolsFrontend : public WebContentsObserver,
 
   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;
@@ -62,11 +72,15 @@ class ShellDevToolsFrontend : public WebContentsObserver,
   // 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);
 };