Add brotli content-encoding filter.

net/http/http_transaction_test_util.h

Index: net/http/http_transaction_test_util.h
diff --git a/net/http/http_transaction_test_util.h b/net/http/http_transaction_test_util.h
index 7744909c871681cd759aa0d8f5d582ae85e8c23b..7e6b54ed9888471113f3fea190d4357cafbba98d 100644
--- a/net/http/http_transaction_test_util.h
+++ b/net/http/http_transaction_test_util.h
@@ -320,6 +320,8 @@ class MockNetworkLayer : public HttpTransactionFactory,
   // The current time (will use clock_ if it is non NULL).
   base::Time Now();
 
+  void set_network_session(HttpNetworkSession* session) { session_ = session; }

[xunjieli, 2015/12/02 18:26:31]

I don't think we want to do this, see the comment in the test for an
alternative.

[eustas, 2015/12/03 12:32:07]

Acknowledged.

+
  private:
   int transaction_count_;
   bool done_reading_called_;
@@ -331,6 +333,8 @@ class MockNetworkLayer : public HttpTransactionFactory,
   base::Clock* clock_;
 
   base::WeakPtr<MockNetworkTransaction> last_transaction_;
+
+  HttpNetworkSession* session_;
 };
 
 //-----------------------------------------------------------------------------