Move code in components/safe_browsing_db and chrome/browser/s_b/ under the safe_browsing namespace.

chrome/browser/safe_browsing/safe_browsing_store.cc

Index: chrome/browser/safe_browsing/safe_browsing_store.cc
diff --git a/chrome/browser/safe_browsing/safe_browsing_store.cc b/chrome/browser/safe_browsing/safe_browsing_store.cc
index e4c15e74b5da2bd9d9d38a2fed561f335f9b3303..326530b3c717b6268eaccc68c358c9703f316186 100644
--- a/chrome/browser/safe_browsing/safe_browsing_store.cc
+++ b/chrome/browser/safe_browsing/safe_browsing_store.cc
@@ -90,6 +90,8 @@ void RemoveDeleted(ItemsT* items, const base::hash_set<int32>& del_set) {
 
 }  // namespace
 
+namespace safe_browsing {
+
 void SBProcessSubs(SBAddPrefixes* add_prefixes,
                    SBSubPrefixes* sub_prefixes,
                    std::vector<SBAddFullHash>* add_full_hashes,
@@ -129,3 +131,5 @@ void SBProcessSubs(SBAddPrefixes* add_prefixes,
   RemoveDeleted(add_full_hashes, add_chunks_deleted);
   RemoveDeleted(sub_full_hashes, sub_chunks_deleted);
 }
+
+}  // namespace safe_browsing