First cut at implementation of FindBar for views / gtk...

views/widget/root_view.cc

Index: views/widget/root_view.cc
===================================================================
--- views/widget/root_view.cc	(revision 25765)
+++ views/widget/root_view.cc	(working copy)
@@ -360,11 +360,12 @@
   if (focus_on_mouse_pressed_) {
 #if defined(OS_WIN)
     HWND hwnd = GetWidget()->GetNativeView();
-    if (::GetFocus() != hwnd) {
+    if (::GetFocus() != hwnd)
       ::SetFocus(hwnd);
-    }
 #else
-    NOTIMPLEMENTED();
+    GtkWidget* widget = GetWidget()->GetNativeView();
+    if (!gtk_widget_is_focus(widget))
+      gtk_widget_grab_focus(widget);
 #endif
   }
 
@@ -782,7 +783,6 @@
     v->ShowContextMenu(screen_loc.x(), screen_loc.y(), false);
     return true;
   }
-
   for (; v && v != this && !consumed; v = v->GetParent()) {
     consumed = (event.GetType() == Event::ET_KEY_PRESSED) ?
         v->OnKeyPressed(event) : v->OnKeyReleased(event);