Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/sessions/tab_restore_browsertest.cc

Index: chrome/browser/sessions/tab_restore_browsertest.cc
diff --git a/chrome/browser/sessions/tab_restore_browsertest.cc b/chrome/browser/sessions/tab_restore_browsertest.cc
index 4d6e849f829145c3d6cb8ffbd90034f64f536222..822dd92bc2471cc3a98c74237de5c049f0e2bceb 100644
--- a/chrome/browser/sessions/tab_restore_browsertest.cc
+++ b/chrome/browser/sessions/tab_restore_browsertest.cc
@@ -546,8 +546,8 @@ IN_PROC_BROWSER_TEST_F(TabRestoreTest, RestoreTabWithSpecialURL) {
 
   // See if content is as expected.
   EXPECT_GT(
-      ui_test_utils::FindInPage(tab, ASCIIToUTF16("webkit"), true, false, NULL,
-                                NULL),
+      ui_test_utils::FindInPage(tab, base::ASCIIToUTF16("webkit"), true, false,
+                                NULL, NULL),
       0);
 }
 
@@ -578,7 +578,7 @@ IN_PROC_BROWSER_TEST_F(TabRestoreTest, RestoreTabWithSpecialURLOnBack) {
   // Go back, and see if content is as expected.
   GoBack(browser());
   EXPECT_GT(
-      ui_test_utils::FindInPage(tab, ASCIIToUTF16("webkit"), true, false, NULL,
-                                NULL),
+      ui_test_utils::FindInPage(tab, base::ASCIIToUTF16("webkit"), true, false,
+                                NULL, NULL),
       0);
 }