Linux: middle-click to navigate

chrome/browser/tab_contents/tab_contents_view_gtk.h

Index: chrome/browser/tab_contents/tab_contents_view_gtk.h
diff --git a/chrome/browser/tab_contents/tab_contents_view_gtk.h b/chrome/browser/tab_contents/tab_contents_view_gtk.h
index 74de6dd07ca828914069cc1b86177303fd05c116..3ebb686eaf5dea6ad76cbcc2c31004e07e0a8f2c 100644
--- a/chrome/browser/tab_contents/tab_contents_view_gtk.h
+++ b/chrome/browser/tab_contents/tab_contents_view_gtk.h
@@ -10,6 +10,7 @@
 #include <vector>
 
 #include "base/scoped_ptr.h"
+#include "base/task.h"
 #include "chrome/browser/gtk/focus_store_gtk.h"
 #include "chrome/browser/tab_contents/tab_contents_view.h"
 #include "chrome/common/notification_observer.h"
@@ -67,6 +68,7 @@ class TabContentsViewGtk : public TabContentsView,
   virtual void GotFocus();
   virtual void TakeFocus(bool reverse);
   virtual void HandleKeyboardEvent(const NativeWebKeyboardEvent& event);
+  virtual void HandleMouseButtonEvent(const WebKit::WebMouseEvent* event);
 
   // NotificationObserver implementation ---------------------------------------
 
@@ -74,6 +76,19 @@ class TabContentsViewGtk : public TabContentsView,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
+  // A callback for when we get the contents of the clipboard.
+  void ClipboardContentsReceived(const gchar* utf8_string);
+
+  class ClipboardRequestCallback {
+   public:
+    ClipboardRequestCallback(TabContentsViewGtk* tab_contents);
+    void Cancel();
+    void Callback(const gchar* utf8_string);
+
+   private:
+    TabContentsViewGtk* tab_contents_view_;
+  };
+
  private:
   // Insert the given widget into the content area. Should only be used for
   // web pages and the like (including interstitials and sad tab). Note that
@@ -125,6 +140,11 @@ class TabContentsViewGtk : public TabContentsView,
   // objects in this vector are owned by the TabContents, not the view.
   std::vector<ConstrainedWindowGtk*> constrained_windows_;
 
+  // On middle-click to navigate, we asynchonously request the clipboard
+  // contents and use the following object to handle the case where this
+  // TabContentsViewGtk has been deleted in the mean time.
+  ClipboardRequestCallback* outstanding_clipboard_contents_request_;
+
   DISALLOW_COPY_AND_ASSIGN(TabContentsViewGtk);
 };