Add Data Saver support to Cronet

components/cronet/android/cronet_url_request_context_adapter.h

Index: components/cronet/android/cronet_url_request_context_adapter.h
diff --git a/components/cronet/android/cronet_url_request_context_adapter.h b/components/cronet/android/cronet_url_request_context_adapter.h
index da44d0f533fe0a644bd1d309059e39750b2514dc..997995c50b96c298ea2d14d0c7c5c908e591af76 100644
--- a/components/cronet/android/cronet_url_request_context_adapter.h
+++ b/components/cronet/android/cronet_url_request_context_adapter.h
@@ -29,6 +29,7 @@ class ProxyConfigService;
 
 namespace cronet {
 
+class CronetDataReductionProxy;
 struct URLRequestContextConfig;
 
 bool CronetUrlRequestContextAdapterRegisterJni(JNIEnv* env);
@@ -98,6 +99,7 @@ class CronetURLRequestContextAdapter {
   std::queue<base::Closure> tasks_waiting_for_context_;
   bool is_context_initialized_;
   int default_load_flags_;
+  scoped_ptr<CronetDataReductionProxy> data_reduction_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(CronetURLRequestContextAdapter);
 };