Generalize the net module's LoadLog facility from a passive container, to an event stream (NetLog).

net/net.gyp

Index: net/net.gyp
===================================================================
--- net/net.gyp	(revision 41560)
+++ net/net.gyp	(working copy)
@@ -83,11 +83,6 @@
         'base/listen_socket.cc',
         'base/listen_socket.h',
         'base/load_flags.h',
-        'base/load_log.h',
-        'base/load_log.cc',
-        'base/load_log_event_type_list.h',
-        'base/load_log_util.cc',
-        'base/load_log_util.h',
         'base/load_states.h',
         'base/mapped_host_resolver.cc',
         'base/mapped_host_resolver.h',
@@ -101,6 +96,11 @@
         'base/net_error_list.h',
         'base/net_errors.cc',
         'base/net_errors.h',
+        'base/net_log.cc',
+        'base/net_log.h',
+        'base/net_log_event_type_list.h',
+        'base/net_log_util.cc',
+        'base/net_log_util.h',
         'base/net_module.cc',
         'base/net_module.h',
         'base/net_util.cc',
@@ -470,7 +470,6 @@
         'spdy/spdy_stream.cc',
         'spdy/spdy_stream.h',
         'spdy/spdy_transaction_factory.h',
-        'url_request/request_tracker.h',
         'url_request/url_request.cc',
         'url_request/url_request.h',
         'url_request/url_request_about_job.cc',
@@ -607,15 +606,14 @@
         'base/host_cache_unittest.cc',
         'base/host_resolver_impl_unittest.cc',
         'base/keygen_handler_unittest.cc',
-        'base/load_log_unittest.cc',
-        'base/load_log_unittest.h',
-        'base/load_log_util_unittest.cc',
         'base/listen_socket_unittest.cc',
         'base/listen_socket_unittest.h',
         'base/mapped_host_resolver_unittest.cc',
         'base/mime_sniffer_unittest.cc',
         'base/mime_util_unittest.cc',
         'base/mock_network_change_notifier.h',
+        'base/net_log_unittest.h',
+        'base/net_log_util_unittest.cc',
         'base/net_test_constants.h',
         'base/net_util_unittest.cc',
         'base/registry_controlled_domain_unittest.cc',
@@ -696,7 +694,6 @@
         'spdy/spdy_protocol_test.cc',
         'spdy/spdy_session_unittest.cc',
         'spdy/spdy_stream_unittest.cc',
-        'url_request/request_tracker_unittest.cc',
         'url_request/url_request_unittest.cc',
         'url_request/url_request_unittest.h',
         'websockets/websocket_job_unittest.cc',