Linux: show tab context menu on mousedown rather than mouse up....

chrome/browser/gtk/tabs/tab_gtk.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/gtk/tabs/tab_gtk.h"
 
 #include "app/gfx/path.h"
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "chrome/browser/gtk/dnd_registry.h"
@@ skipping 149 matching lines @@
 gboolean TabGtk::OnMousePress(GtkWidget* widget, GdkEventButton* event,
                               TabGtk* tab) {
   if (event->button == 1) {
     // Store whether or not we were selected just now... we only want to be
     // able to drag foreground tabs, so we don't start dragging the tab if
     // it was in the background.
     bool just_selected = !tab->IsSelected();
     if (just_selected) {
       tab->delegate_->SelectTab(tab);
     }
+  } else if (event->button == 3) {
+    tab->ShowContextMenu();
   }
 
   return TRUE;
 }
 
 // static
 gboolean TabGtk::OnMouseRelease(GtkWidget* widget, GdkEventButton* event,
                                 TabGtk* tab) {
   if (event->button == 2) {
     tab->delegate_->CloseTab(tab);
-  } else if (event->button == 3) {
-    tab->ShowContextMenu();
   }
 
   return TRUE;
 }
 
 // static
 gboolean TabGtk::OnEnterNotify(GtkWidget* widget, GdkEventCrossing* event,
                                TabGtk* tab) {
   tab->OnMouseEntered();
   return TRUE;
@@ skipping 85 matching lines @@
   if (!menu_controller_.get())
     menu_controller_.reset(new ContextMenuController(this));
 
   menu_controller_->RunMenu();
 }
 
 void TabGtk::ContextMenuClosed() {
   delegate()->StopAllHighlighting();
   menu_controller_.reset();
 }