Make browser windows override_redirect when dragging tabs.

chrome/browser/ui/browser.h

Index: chrome/browser/ui/browser.h
diff --git a/chrome/browser/ui/browser.h b/chrome/browser/ui/browser.h
index 362d85a679987c6b877490bdc4797511cc8a8afe..4a8b8c69a0bc09596943abaeaf4c4701aa60a21e 100644
--- a/chrome/browser/ui/browser.h
+++ b/chrome/browser/ui/browser.h
@@ -194,6 +194,10 @@ class Browser : public TabStripModelObserver,
     // default. Intended for testing.
     BrowserWindow* window;
 
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+    bool override_redirect;

[Daniel Erat, 2015/12/28 21:33:02]

the Browser object itself isn't override-redirect; that's an implementation
detail in the X11 implementation of Views. i think that Browser should probably
either have a new Type value named TYPE_DRAGGED, or use a name like
is_being_dragged for this member.

[stapelberg, 2016/01/18 17:22:23]

Done.

+#endif
+
    private:
     friend class Browser;
 
@@ -465,6 +469,10 @@ class Browser : public TabStripModelObserver,
   bool is_type_tabbed() const { return type_ == TYPE_TABBED; }
   bool is_type_popup() const { return type_ == TYPE_POPUP; }
 
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+  bool is_override_redirect() const { return override_redirect_; }
+#endif
+
   bool is_app() const;
   bool is_devtools() const;
 
@@ -969,6 +977,10 @@ class Browser : public TabStripModelObserver,
 
   scoped_ptr<ValidationMessageBubble> validation_message_bubble_;
 
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+  bool override_redirect_;
+#endif
+
   // The following factory is used for chrome update coalescing.
   base::WeakPtrFactory<Browser> chrome_updater_factory_;