Expose changes in the network quality to the renderers

content/renderer/render_thread_impl.h

 // Copyright (c) 2012 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_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 546 matching lines @@
   void CreateView(mojom::CreateViewParamsPtr params) override;
   void CreateFrame(mojom::CreateFrameParamsPtr params) override;
   void CreateFrameProxy(int32_t routing_id,
                         int32_t render_view_routing_id,
                         int32_t opener_routing_id,
                         int32_t parent_routing_id,
                         const FrameReplicationState& replicated_state) override;
   void OnNetworkConnectionChanged(
       net::NetworkChangeNotifier::ConnectionType type,
       double max_bandwidth_mbps) override;
+  void OnNetworkQualityChanged(double http_rtt_msec,
+                               double transport_rtt_msec,
+                               double bandwidth_kbps) override;
   void SetWebKitSharedTimersSuspended(bool suspend) override;
   void UpdateScrollbarTheme(
       mojom::UpdateScrollbarThemeParamsPtr params) override;
   void OnSystemColorsChanged(int32_t aqua_color_variant,
                              const std::string& highlight_text_color,
                              const std::string& highlight_color) override;
   void PurgePluginListCache(bool reload_pages) override;
 
   void OnMemoryPressure(
       base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level);
@@ skipping 218 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_