Use base namespace for string16 in chrome/renderer.

chrome/renderer/autofill/autofill_renderer_browsertest.cc

Index: chrome/renderer/autofill/autofill_renderer_browsertest.cc
diff --git a/chrome/renderer/autofill/autofill_renderer_browsertest.cc b/chrome/renderer/autofill/autofill_renderer_browsertest.cc
index 1054d4186af49ef87ac0f70e2bf8ddeadda9d66b..831cbda9a14d28101caad07c4a7001a35f9fa864 100644
--- a/chrome/renderer/autofill/autofill_renderer_browsertest.cc
+++ b/chrome/renderer/autofill/autofill_renderer_browsertest.cc
@@ -57,19 +57,19 @@ TEST_F(ChromeRenderViewTest, SendForms) {
   FormFieldData expected;
 
   expected.name = ASCIIToUTF16("firstname");
-  expected.value = string16();
+  expected.value = base::string16();
   expected.form_control_type = "text";
   expected.max_length = WebInputElement::defaultMaxLength();
   EXPECT_FORM_FIELD_DATA_EQUALS(expected, forms[0].fields[0]);
 
   expected.name = ASCIIToUTF16("middlename");
-  expected.value = string16();
+  expected.value = base::string16();
   expected.form_control_type = "text";
   expected.max_length = WebInputElement::defaultMaxLength();
   EXPECT_FORM_FIELD_DATA_EQUALS(expected, forms[0].fields[1]);
 
   expected.name = ASCIIToUTF16("lastname");
-  expected.value = string16();
+  expected.value = base::string16();
   expected.form_control_type = "text";
   expected.autocomplete_attribute = "off";
   expected.max_length = WebInputElement::defaultMaxLength();
@@ -113,13 +113,13 @@ TEST_F(ChromeRenderViewTest, SendForms) {
   ASSERT_EQ(3UL, form2.fields.size());
 
   expected.name = ASCIIToUTF16("firstname");
-  expected.value = string16();
+  expected.value = base::string16();
   expected.form_control_type = "text";
   expected.max_length = WebInputElement::defaultMaxLength();
   EXPECT_FORM_FIELD_DATA_EQUALS(expected, form2.fields[0]);
 
   expected.name = ASCIIToUTF16("middlename");
-  expected.value = string16();
+  expected.value = base::string16();
   expected.form_control_type = "text";
   expected.max_length = WebInputElement::defaultMaxLength();
   EXPECT_FORM_FIELD_DATA_EQUALS(expected, form2.fields[1]);