Add key modifier to minimize/restore button click to minimize/restore-all panels for GTK

chrome/browser/ui/panels/panel_browser_titlebar_gtk.cc

 // Copyright (c) 2012 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/ui/panels/panel_browser_titlebar_gtk.h"
 
 #include "chrome/browser/ui/gtk/custom_button.h"
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_browser_window_gtk.h"
 #include "grit/generated_resources.h"
@@ skipping 65 matching lines @@
 void PanelBrowserTitlebarGtk::UpdateMinimizeRestoreButtonVisibility() {
   if (!unminimize_button_.get() || !minimize_button())
     return;
 
   Panel* panel = browser_window_->panel();
   gtk_widget_set_visible(minimize_button()->widget(), panel->CanMinimize());
   gtk_widget_set_visible(unminimize_button_->widget(), panel->CanRestore());
 }
 
 void PanelBrowserTitlebarGtk::HandleButtonClick(GtkWidget* button) {
-  if (close_button() && close_button()->widget() == button)
+  if (close_button() && close_button()->widget() == button) {
     browser_window_->panel()->Close();
-  else if (minimize_button() && minimize_button()->widget() == button)
-    browser_window_->panel()->Minimize();
-  else if (unminimize_button_.get() && unminimize_button_->widget() == button)
-    browser_window_->panel()->Restore();
+    return;
+  }
+
+  GdkEvent* event = gtk_get_current_event();
+  DCHECK(event && event->type == GDK_BUTTON_RELEASE);
+
+  if (minimize_button() && minimize_button()->widget() == button) {
+    browser_window_->panel()->OnMinimizeButtonClicked(
+        (event->button.state & GDK_CONTROL_MASK) ?
+            panel::APPLY_TO_ALL : panel::NO_MODIFIER);
+  } else if (unminimize_button_.get() &&
+             unminimize_button_->widget() == button) {
+    browser_window_->panel()->OnRestoreButtonClicked(
+        (event->button.state & GDK_CONTROL_MASK) ?
+            panel::APPLY_TO_ALL : panel::NO_MODIFIER);
+  }
+
+  gdk_event_free(event);
 }
 
 void PanelBrowserTitlebarGtk::ShowFaviconMenu(GdkEventButton* event) {
   // Favicon menu is not supported in panels.
 }