views: Do not show up a tooltip when hovering on the magnifying glass on NTP.

chrome/browser/ui/views/location_bar/location_icon_view.cc

Index: chrome/browser/ui/views/location_bar/location_icon_view.cc
diff --git a/chrome/browser/ui/views/location_bar/location_icon_view.cc b/chrome/browser/ui/views/location_bar/location_icon_view.cc
index 0e70a66148173e0d27a914d0d159019aa97ec2bd..66aad674ef187e46acb387170d21ff6b4a04ac69 100644
--- a/chrome/browser/ui/views/location_bar/location_icon_view.cc
+++ b/chrome/browser/ui/views/location_bar/location_icon_view.cc
@@ -27,3 +27,12 @@ void LocationIconView::OnMouseReleased(const views::MouseEvent& event,
                                        bool canceled) {
   click_handler_.OnMouseReleased(event, canceled);
 }
+
+void LocationIconView::ShowTooltip(bool show) {
+  if (show) {
+    SetTooltipText(UTF16ToWide(l10n_util::GetStringUTF16(
+            IDS_TOOLTIP_LOCATION_ICON)));
+  } else {
+    SetTooltipText(L"");
+  }
+}