Replace Pipeline::SetNetworkActivity() with BufferedDataSource -> WebMediaPlayerImpl callback.

media/filters/pipeline_integration_test.cc

Index: media/filters/pipeline_integration_test.cc
diff --git a/media/filters/pipeline_integration_test.cc b/media/filters/pipeline_integration_test.cc
index 54da1d24f0d770b2382ed857294e541e7796b44a..f9a18ea1d05679948fda349e53e86e90ad54917c 100644
--- a/media/filters/pipeline_integration_test.cc
+++ b/media/filters/pipeline_integration_test.cc
@@ -116,7 +116,7 @@ class PipelineIntegrationTest
         CreateFilterCollection(&source),
         base::Bind(&PipelineIntegrationTest::OnEnded, base::Unretained(this)),
         base::Bind(&PipelineIntegrationTest::OnError, base::Unretained(this)),
-        NetworkEventCB(), QuitOnStatusCB(PIPELINE_OK));
+        QuitOnStatusCB(PIPELINE_OK));
 
     ASSERT_TRUE(decoder_.get());
     source.set_decryptor(decryptor_.get());