Add base:: to string16s in chrome/.

chrome/third_party/mozilla_security_manager/nsNSSCertHelper.cpp

Index: chrome/third_party/mozilla_security_manager/nsNSSCertHelper.cpp
diff --git a/chrome/third_party/mozilla_security_manager/nsNSSCertHelper.cpp b/chrome/third_party/mozilla_security_manager/nsNSSCertHelper.cpp
index bcea88e61c00ad9c4c11587b48e1f973fde59603..42a0f62f2a0988a953eb469df7b5fda3144be207 100644
--- a/chrome/third_party/mozilla_security_manager/nsNSSCertHelper.cpp
+++ b/chrome/third_party/mozilla_security_manager/nsNSSCertHelper.cpp
@@ -446,7 +446,7 @@ std::string ProcessBasicConstraints(SECItem* extension_data) {
     rv = l10n_util::GetStringUTF8(IDS_CERT_X509_BASIC_CONSTRAINT_IS_NOT_CA);
   rv += '\n';
   if (value.pathLenConstraint != -1) {
-    string16 depth;
+    base::string16 depth;
     if (value.pathLenConstraint == CERT_UNLIMITED_PATH_CONSTRAINT) {
       depth = l10n_util::GetStringUTF16(
           IDS_CERT_X509_BASIC_CONSTRAINT_PATH_LEN_UNLIMITED);
@@ -827,8 +827,8 @@ std::string ProcessAuthInfoAccess(SECItem* extension_data) {
 
   while (*aia != NULL) {
     desc = *aia++;
-    string16 location_str = UTF8ToUTF16(ProcessGeneralName(arena.get(),
-                                                           desc->location));
+    base::string16 location_str =
+        UTF8ToUTF16(ProcessGeneralName(arena.get(), desc->location));
     switch (SECOID_FindOIDTag(&desc->method)) {
     case SEC_OID_PKIX_OCSP:
       rv += l10n_util::GetStringFUTF8(IDS_CERT_OCSP_RESPONDER_FORMAT,