Enable setting capture to a non-toplevel widget when the widget is activated on Linux

ui/views/widget/widget_interactive_uitest.cc

 // Copyright (c) 2013 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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
@@ skipping 986 matching lines @@
   // Send a mouse event to the RootWindow associated with |widget1|. Even though
   // |widget2| has capture, |widget1| should still get the event.
   ui::MouseEvent mouse_event(ui::ET_MOUSE_EXITED, gfx::Point(), gfx::Point(),
                              ui::EF_NONE, ui::EF_NONE);
   ui::EventDispatchDetails details = widget1.GetNativeWindow()->
       GetHost()->event_processor()->OnEventFromSource(&mouse_event);
   ASSERT_FALSE(details.dispatcher_destroyed);
   EXPECT_TRUE(widget1.GetAndClearGotMouseEvent());
   EXPECT_FALSE(widget2.GetAndClearGotMouseEvent());
 }
+
+// Widget observer which grabs capture when the widget is activated.
+class CaptureOnActivationObserver : public WidgetObserver {
+ public:
+  CaptureOnActivationObserver() {
+  }
+  virtual ~CaptureOnActivationObserver() {
+  }
+
+  virtual void OnWidgetActivationChanged(Widget* widget, bool active) OVERRIDE {

[sadrul, 2014/07/14 16:58:00]

// WidgetObserver:

+    if (active)
+      widget->SetCapture(NULL);
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CaptureOnActivationObserver);
+};
+
+// Test that setting capture on widget activation of a non-toplevel widget
+// (e.g. a bubble on Linux) succeeds.
+TEST_F(WidgetCaptureTest, SetCaptureToNonToplevel) {
+  Widget toplevel;
+  Widget::InitParams toplevel_params =
+      CreateParams(Widget::InitParams::TYPE_WINDOW_FRAMELESS);
+  toplevel_params.native_widget = new DesktopNativeWidgetAura(&toplevel);
+  toplevel_params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+  toplevel.Init(toplevel_params);
+  toplevel.Show();
+
+  Widget* child = new Widget;
+  Widget::InitParams child_params =
+      CreateParams(Widget::InitParams::TYPE_WINDOW_FRAMELESS);
+  child_params.parent = toplevel.GetNativeView();
+  child_params.context = toplevel.GetNativeView();
+  child->Init(child_params);
+
+  CaptureOnActivationObserver observer;
+  child->AddObserver(&observer);
+  child->Show();
+
+  EXPECT_TRUE(child->HasCapture());
+}
 #endif
 
 }  // namespace test
 }  // namespace views