Update from https://crrev.com/304418

net/base/net_log_util.cc

Index: net/base/net_log_util.cc
diff --git a/net/base/net_log_util.cc b/net/base/net_log_util.cc
index b8816bad919441a12428d49f79ffb19ddb6027bc..a15e8998c4c86a583c6f637c768c1e86cd75f683 100644
--- a/net/base/net_log_util.cc
+++ b/net/base/net_log_util.cc
@@ -15,6 +15,7 @@
 #include "net/base/load_states.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_log.h"
+#include "net/base/sdch_manager.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/dns/host_cache.h"
 #include "net/dns/host_resolver.h"
@@ -66,6 +67,14 @@ const short kNetErrors[] = {
 #undef NET_ERROR
 };
 
+const StringToConstant kSdchProblems[] = {
+#define SDCH_PROBLEM_CODE(label, value) \
+  { #label, value }                     \
+  ,
+#include "net/base/sdch_problem_code_list.h"
+#undef SDCH_PROBLEM_CODE
+};
+
 const char* NetInfoSourceToString(NetInfoSource source) {
   switch (source) {
     #define NET_INFO_SOURCE(label, string, value) \
@@ -187,6 +196,17 @@ scoped_ptr<base::DictionaryValue> GetNetConstants() {
     constants_dict->Set("quicRstStreamError", dict);
   }
 
+  // Add information on the relationship between SDCH problem codes and their
+  // symbolic names.
+  {
+    base::DictionaryValue* dict = new base::DictionaryValue();
+
+    for (size_t i = 0; i < arraysize(kSdchProblems); i++)
+      dict->SetInteger(kSdchProblems[i].name, kSdchProblems[i].constant);
+
+    constants_dict->Set("sdchProblemCode", dict);
+  }
+
   // Information about the relationship between event phase enums and their
   // symbolic names.
   {
@@ -455,6 +475,17 @@ NET_EXPORT scoped_ptr<base::DictionaryValue> GetNetInfo(
                        info_dict);
   }
 
+  if (info_sources & NET_INFO_SDCH) {
+    base::Value* info_dict;
+    SdchManager* sdch_manager = context->sdch_manager();
+    if (sdch_manager) {
+      info_dict = sdch_manager->SdchInfoToValue();
+    } else {
+      info_dict = new base::DictionaryValue();
+    }
+    net_info_dict->Set(NetInfoSourceToString(NET_INFO_SDCH), info_dict);
+  }
+
   return net_info_dict.Pass();
 }