Extracted NetLog class's inner enum types into their own enum classes and

net/filter/sdch_filter.cc

Index: net/filter/sdch_filter.cc
diff --git a/net/filter/sdch_filter.cc b/net/filter/sdch_filter.cc
index 85be8905fa76cb179dbbcfb3b629a9b6e48b381a..3b599cf57b39bd9ccea5ffc3dd0e1168cfb6df58 100644
--- a/net/filter/sdch_filter.cc
+++ b/net/filter/sdch_filter.cc
@@ -15,6 +15,7 @@
 #include "net/base/sdch_manager.h"
 #include "net/base/sdch_net_log_params.h"
 #include "net/base/sdch_problem_codes.h"
+#include "net/log/net_log_event_type.h"
 #include "net/url_request/url_request_context.h"
 #include "sdch/open-vcdiff/src/google/vcdecoder.h"
 
@@ -338,7 +339,7 @@ Filter::FilterStatus SdchFilter::ReadFilteredData(char* dest_buffer,
             "Sdch3.ResponseCorruptionDetection.Uncached", cause, RESPONSE_MAX);
       }
       filter_context_.GetNetLog().AddEvent(
-          NetLog::TYPE_SDCH_RESPONSE_CORRUPTION_DETECTION,
+          NetLogEventType::SDCH_RESPONSE_CORRUPTION_DETECTION,
           base::Bind(&NetLogSdchResponseCorruptionDetectionCallback, cause,
                      filter_context_.IsCachedContent()));
 
@@ -561,7 +562,7 @@ int SdchFilter::OutputBufferExcess(char* const dest_buffer,
 void SdchFilter::LogSdchProblem(SdchProblemCode problem) {
   SdchManager::SdchErrorRecovery(problem);
   filter_context_.GetNetLog().AddEvent(
-      NetLog::TYPE_SDCH_DECODING_ERROR,
+      NetLogEventType::SDCH_DECODING_ERROR,
       base::Bind(&NetLogSdchResourceProblemCallback, problem));
 }