Revert of Replace string::find(prefix) == 0 pattern with base::StartsWith().

content/browser/dom_storage/session_storage_database.cc

Index: content/browser/dom_storage/session_storage_database.cc
diff --git a/content/browser/dom_storage/session_storage_database.cc b/content/browser/dom_storage/session_storage_database.cc
index f3ac14da3c9d91dd2d5afa57c0191e325f769b2b..3a9457121d297554867fd5309ba3558dcfe9e76d 100644
--- a/content/browser/dom_storage/session_storage_database.cc
+++ b/content/browser/dom_storage/session_storage_database.cc
@@ -298,8 +298,7 @@
   std::string current_namespace_id;
   for (it->Next(); it->Valid(); it->Next()) {
     std::string key = it->key().ToString();
-    if (!base::StartsWith(key, namespace_prefix,
-                          base::CompareCase::SENSITIVE)) {
+    if (key.find(namespace_prefix) != 0) {
       // Iterated past the "namespace-" keys.
       break;
     }
@@ -498,8 +497,7 @@
   // Skip the dummy entry "namespace-<namespaceid>-" and iterate the origins.
   for (it->Next(); it->Valid(); it->Next()) {
     std::string key = it->key().ToString();
-    if (!base::StartsWith(key, namespace_start_key,
-                          base::CompareCase::SENSITIVE)) {
+    if (key.find(namespace_start_key) != 0) {
       // Iterated past the origins for this namespace.
       break;
     }
@@ -551,7 +549,7 @@
   if (!it->Valid())
     return true;
   std::string key = it->key().ToString();
-  if (!base::StartsWith(key, namespace_start_key, base::CompareCase::SENSITIVE))
+  if (key.find(namespace_start_key) != 0)
     batch->Delete(namespace_start_key);
   return true;
 }
@@ -610,7 +608,7 @@
   // Skip the dummy entry "map-<mapid>-".
   for (it->Next(); it->Valid(); it->Next()) {
     std::string key = it->key().ToString();
-    if (!base::StartsWith(key, map_start_key, base::CompareCase::SENSITIVE)) {
+    if (key.find(map_start_key) != 0) {
       // Iterated past the keys in this map.
       break;
     }