Add LoadState reporting to the mojo proxy resolver.

net/proxy/proxy_resolver_v8_tracing.h

 // Copyright (c) 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 NET_PROXY_PROXY_RESOLVER_V8_TRACING_H_
 #define NET_PROXY_PROXY_RESOLVER_V8_TRACING_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 24 matching lines @@
   // Constructs a ProxyResolver that will issue DNS requests through
   // |host_resolver|, forward Javascript errors through |error_observer|, and
   // log Javascript errors and alerts to |net_log|.
   //
   // Note that the constructor takes ownership of |error_observer|, whereas
   // |host_resolver| and |net_log| are expected to outlive |this|.
   ProxyResolverV8Tracing(HostResolver* host_resolver,
                          ProxyResolverErrorObserver* error_observer,
                          NetLog* net_log);
 
+  // Constructs a ProxyResolver that will issue DNS requests through
+  // |host_resolver|, forward Javascript errors through |error_observer|, and
+  // log Javascript errors and alerts to |net_log|. When the LoadState for a
+  // request changes, |on_load_state_changed| will be invoked with the
+  // RequestHandle for that request with the new LoadState.
+  //
+  // Note that the constructor takes ownership of |error_observer|, whereas
+  // |host_resolver| and |net_log| are expected to outlive |this|.
+  ProxyResolverV8Tracing(HostResolver* host_resolver,
+                         ProxyResolverErrorObserver* error_observer,
+                         NetLog* net_log,
+                         const LoadStateChangedCallback& on_load_state_changed);
+
   ~ProxyResolverV8Tracing() override;
 
   // ProxyResolver implementation:
   int GetProxyForURL(const GURL& url,
                      ProxyInfo* results,
                      const CompletionCallback& callback,
                      RequestHandle* request,
                      const BoundNetLog& net_log) override;
   void CancelRequest(RequestHandle request) override;
   LoadState GetLoadState(RequestHandle request) const override;
@@ skipping 13 matching lines @@
 
   scoped_ptr<ProxyResolverErrorObserver> error_observer_;
   NetLog* net_log_;
 
   // The outstanding SetPacScript operation, or NULL.
   scoped_refptr<Job> set_pac_script_job_;
 
   // The number of outstanding (non-cancelled) jobs.
   int num_outstanding_callbacks_;
 
+  // Invoked when the load state for a request changes.
+  const LoadStateChangedCallback on_load_state_changed_;
+
   DISALLOW_COPY_AND_ASSIGN(ProxyResolverV8Tracing);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_RESOLVER_V8_TRACING_H_