Update uses of UTF conversions in content/ to use the base:: namespace.

content/common/page_state_serialization.cc

Index: content/common/page_state_serialization.cc
diff --git a/content/common/page_state_serialization.cc b/content/common/page_state_serialization.cc
index 5384ab55a52102c53a4d2d76b2a3e257485b9429..4fba5075690a2fe6ab96be6c784f067837454f1c 100644
--- a/content/common/page_state_serialization.cc
+++ b/content/common/page_state_serialization.cc
@@ -616,7 +616,8 @@ void ReadPageState(SerializeObject* obj, ExplodedPageState* state) {
     GURL url = ReadGURL(obj);
     // NOTE: GURL::possibly_invalid_spec() always returns valid UTF-8.
     state->top.url_string = state->top.original_url_string =
-        base::NullableString16(UTF8ToUTF16(url.possibly_invalid_spec()), false);
+        base::NullableString16(
+            base::UTF8ToUTF16(url.possibly_invalid_spec()), false);
     return;
   }