Convert string16 to base::string16 in content.

content/browser/indexed_db/indexed_db_browsertest.cc

Index: content/browser/indexed_db/indexed_db_browsertest.cc
diff --git a/content/browser/indexed_db/indexed_db_browsertest.cc b/content/browser/indexed_db/indexed_db_browsertest.cc
index 9fca832cc2c052fe858d0908557b1f32cbd2361e..2b95cd07f8677ed9222743410bce6a7e42306d53 100644
--- a/content/browser/indexed_db/indexed_db_browsertest.cc
+++ b/content/browser/indexed_db/indexed_db_browsertest.cc
@@ -66,7 +66,7 @@ class IndexedDBBrowserTest : public ContentBrowserTest {
     if (hash)
       url = GURL(url.spec() + hash);
 
-    string16 expected_title16(ASCIIToUTF16(expected_string));
+    base::string16 expected_title16(ASCIIToUTF16(expected_string));
     TitleWatcher title_watcher(shell->web_contents(), expected_title16);
     NavigateToURL(shell, url);
     EXPECT_EQ(expected_title16, title_watcher.WaitAndGetTitle());
@@ -399,7 +399,7 @@ IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTest, ConnectionsClosedOnTabClose) {
   NavigateAndWaitForTitle(new_shell, "version_change_blocked.html", "#tab2",
                           "setVersion(3) blocked");
 
-  string16 expected_title16(ASCIIToUTF16("setVersion(3) complete"));
+  base::string16 expected_title16(ASCIIToUTF16("setVersion(3) complete"));
   TitleWatcher title_watcher(new_shell->web_contents(), expected_title16);
 
   base::KillProcess(
@@ -421,7 +421,7 @@ IN_PROC_BROWSER_TEST_F(IndexedDBBrowserTest, ForceCloseEventTest) {
                  GetContext(),
                  GURL("file:///")));
 
-  string16 expected_title16(ASCIIToUTF16("connection closed"));
+  base::string16 expected_title16(ASCIIToUTF16("connection closed"));
   TitleWatcher title_watcher(shell()->web_contents(), expected_title16);
   EXPECT_EQ(expected_title16, title_watcher.WaitAndGetTitle());
 }