Implement stop/go button for Linux

chrome/browser/views/go_button.cc

Index: chrome/browser/views/go_button.cc
diff --git a/chrome/browser/views/go_button.cc b/chrome/browser/views/go_button.cc
index 48773ae39adb130ca33c21a3452f9636d9bdcb6d..f276e92ac7db04172ddcb9f2d60aef827f5c99a1 100644
--- a/chrome/browser/views/go_button.cc
+++ b/chrome/browser/views/go_button.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/views/go_button.h"
 
+#include "base/message_loop.h"
 #include "chrome/app/chrome_dll_resource.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/views/event_utils.h"
@@ -97,8 +98,6 @@ void GoButton::ButtonPressed(views::Button* button) {
 // GoButton, View overrides:
 
 void GoButton::OnMouseExited(const views::MouseEvent& e) {
-  using namespace views;
-
   if (visible_mode_ != intended_mode_)
     ChangeMode(intended_mode_);