Gets GoButton to compile on Linux.

chrome/browser/views/go_button.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/views/go_button.h"
 
 #include "app/l10n_util.h"
+#include "base/compiler_specific.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"
 #include "chrome/browser/views/location_bar_view.h"
 #include "grit/generated_resources.h"
 
 ////////////////////////////////////////////////////////////////////////////////
 // GoButton, public:
 
 GoButton::GoButton(LocationBarView* location_bar, Browser* browser)
     : ToggleImageButton(this),
+      button_delay_(0),
+      ALLOW_THIS_IN_INITIALIZER_LIST(stop_timer_(this)),
       location_bar_(location_bar),
       browser_(browser),
       intended_mode_(MODE_GO),
-      visible_mode_(MODE_GO),
-      button_delay_(NULL),
-      stop_timer_(this) {
+      visible_mode_(MODE_GO) {
   DCHECK(location_bar_);
   set_triggerable_event_flags(views::Event::EF_LEFT_BUTTON_DOWN |
                            views::Event::EF_MIDDLE_BUTTON_DOWN);
 }
 
 GoButton::~GoButton() {
   stop_timer_.RevokeAll();
 }
 
 void GoButton::ChangeMode(Mode mode, bool force) {
@@ skipping 18 matching lines @@
     browser_->Stop();
 
     // The user has clicked, so we can feel free to update the button,
     // even if the mouse is still hovering.
     ChangeMode(MODE_GO, true);
   } else if (visible_mode_ == MODE_GO && stop_timer_.empty()) {
     // If the go button is visible and not within the double click timer, go.
     browser_->Go(event_utils::DispositionFromEventFlags(mouse_event_flags()));
 
     // Figure out the system double-click time.
-    if (button_delay_ == NULL)
+    if (button_delay_ == 0) {
+#if defined(OS_WIN)
       button_delay_ = GetDoubleClickTime();
+#else
+      NOTIMPLEMENTED();
+      button_delay_ = 500;
+#endif
+    }
 
     // Stop any existing timers.
     stop_timer_.RevokeAll();
 
     // Start a timer - while this timer is running, the go button
     // cannot be changed to a stop button. We do not set intended_mode_
     // to MODE_STOP here as we want to wait for the browser to tell
     // us that it has started loading (and this may occur only after
     // some delay).
     MessageLoop::current()->PostDelayedTask(FROM_HERE,
@@ skipping 42 matching lines @@
   return true;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // GoButton, private:
 
 void GoButton::OnButtonTimer() {
   stop_timer_.RevokeAll();
   ChangeMode(intended_mode_, true);
 }