Move more string_util functions to base namespace.

chrome/browser/ui/omnibox/omnibox_view.cc

Index: chrome/browser/ui/omnibox/omnibox_view.cc
diff --git a/chrome/browser/ui/omnibox/omnibox_view.cc b/chrome/browser/ui/omnibox/omnibox_view.cc
index 177bb7ecbf5ca84fe9bf8fe026200730d9b4cb87..02e33029eb4850f9989ccf9801c337bc7f7c8fc4 100644
--- a/chrome/browser/ui/omnibox/omnibox_view.cc
+++ b/chrome/browser/ui/omnibox/omnibox_view.cc
@@ -42,7 +42,8 @@ base::string16 OmniboxView::SanitizeTextForPaste(const base::string16& text) {
   // TODO(shess): It may also make sense to ignore leading or
   // trailing whitespace when making this determination.
   for (size_t i = 0; i < text.size(); ++i) {
-    if (IsWhitespace(text[i]) && text[i] != '\n' && text[i] != '\r') {
+    if (base::IsUnicodeWhitespace(text[i]) &&
+        text[i] != '\n' && text[i] != '\r') {
       const base::string16 collapsed = base::CollapseWhitespace(text, false);
       // If the user is pasting all-whitespace, paste a single space
       // rather than nothing, since pasting nothing feels broken.