[NOT FOR LANDING] Detailed loading traces

components/safe_browsing_db/prefix_set.cc

Index: components/safe_browsing_db/prefix_set.cc
diff --git a/components/safe_browsing_db/prefix_set.cc b/components/safe_browsing_db/prefix_set.cc
index ede92233ebf749402bca2135c20393762af03772..1cf6e0f9bfa03f01eab29174fb33c0832c2a071a 100644
--- a/components/safe_browsing_db/prefix_set.cc
+++ b/components/safe_browsing_db/prefix_set.cc
@@ -15,6 +15,7 @@
 #include "base/md5.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/sparse_histogram.h"
+#include "base/trace_event/trace_event.h"
 
 namespace safe_browsing {
 
@@ -102,6 +103,7 @@ PrefixSet::PrefixSet(IndexVector* index,
 PrefixSet::~PrefixSet() {}
 
 bool PrefixSet::PrefixExists(SBPrefix prefix) const {
+  TRACE_EVENT0("toplevel", "PrefixSet::PrefixExists");
   if (index_.empty())
     return false;
 
@@ -134,10 +136,13 @@ bool PrefixSet::PrefixExists(SBPrefix prefix) const {
 }
 
 bool PrefixSet::Exists(const SBFullHash& hash) const {
+  TRACE_EVENT0("toplevel", "PrefixSet::Exists");
+
   if (std::binary_search(full_hashes_.begin(), full_hashes_.end(),
                          hash, SBFullHashLess)) {
     return true;
   }
+  TRACE_EVENT0("toplevel", "PrefixSet::Exists::B");
   return PrefixExists(hash.prefix);
 }