Replace string16 with base::string16.

chrome/browser/browsing_data/browsing_data_database_helper_browsertest.cc

Index: chrome/browser/browsing_data/browsing_data_database_helper_browsertest.cc
diff --git a/chrome/browser/browsing_data/browsing_data_database_helper_browsertest.cc b/chrome/browser/browsing_data/browsing_data_database_helper_browsertest.cc
index f9ad7e4ca10b0d7f89fbabbcd2a3592657f2093a..6037323e98d51037d3145f2ae85e063de0d7b011 100644
--- a/chrome/browser/browsing_data/browsing_data_database_helper_browsertest.cc
+++ b/chrome/browser/browsing_data/browsing_data_database_helper_browsertest.cc
@@ -33,8 +33,8 @@ class BrowsingDataDatabaseHelperTest : public InProcessBrowserTest {
     webkit_database::DatabaseTracker* db_tracker =
         BrowserContext::GetDefaultStoragePartition(browser()->profile())->
             GetDatabaseTracker();
-    string16 db_name = ASCIIToUTF16("db");
-    string16 description = ASCIIToUTF16("db_description");
+    base::string16 db_name = ASCIIToUTF16("db");
+    base::string16 description = ASCIIToUTF16("db_description");
     int64 size;
     db_tracker->DatabaseOpened(kTestIdentifier1, db_name, description,
                                1, &size);