Fix Flash fullscreen focus regressions, and add interactive_ui_tests.

ppapi/tests/test_flash_fullscreen_for_browser_ui.h

+// Copyright 2014 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.
+
+#ifndef PPAPI_TESTS_TEST_FLASH_FULLSCREEN_FOR_BROWSER_UI_H_
+#define PPAPI_TESTS_TEST_FLASH_FULLSCREEN_FOR_BROWSER_UI_H_
+
+#include <string>
+
+#include "ppapi/cpp/compositor.h"
+#include "ppapi/cpp/compositor_layer.h"
+#include "ppapi/cpp/private/flash_fullscreen.h"
+#include "ppapi/cpp/size.h"
+#include "ppapi/tests/test_case.h"
+#include "ppapi/tests/test_utils.h"
+#include "ppapi/utility/completion_callback_factory.h"
+
+// This is a special TestCase whose purpose is *not* to test the correctness of
+// the PPAPI's.  Instead, this is a simulated Flash plugin, used to place the

[raymes, 2014/10/24 00:51:08]

nit: PPAPI's->Pepper APIs

[miu, 2014/10/24 21:20:09]

Done.

+// browser window and other UI elements into Flash Fullscreen mode for layout,
+// event, focus, etc. testing.  See
+// chrome/browser/ui/fullscreen/flash_fullscreen_interactive_browsertest.cc.
+//
+// At start, this simulated Flash plugin will enter fullscreen and paint a green
+// color fill.  From there, it will respond to mouse clicks or key presses by
+// toggling its fill color between red and blue.  The browser test reads these
+// color changes to detect the desired behavior.
+class TestFlashFullscreenForBrowserUI : public TestCase {
+ public:
+  explicit TestFlashFullscreenForBrowserUI(TestingInstance* instance);
+  virtual ~TestFlashFullscreenForBrowserUI();
+
+  // TestCase implementation.
+  virtual bool Init() override;
+  virtual void RunTests(const std::string& filter) override;
+  virtual void DidChangeView(const pp::View& view) override;
+  virtual bool HandleInputEvent(const pp::InputEvent& event) override;
+
+ private:
+  std::string TestEnterFullscreen();
+  void Paint(int32_t last_compositor_result);
+
+  pp::FlashFullscreen screen_mode_;
+  NestedEvent view_change_event_;
+
+  pp::Compositor compositor_;
+  pp::Size layer_size_;
+  pp::CompositorLayer color_layer_;
+
+  int num_trigger_events_;
+
+  pp::CompletionCallbackFactory<TestFlashFullscreenForBrowserUI>
+      callback_factory_;
+};
+
+#endif  // PPAPI_TESTS_TEST_FLASH_FULLSCREEN_FOR_BROWSER_UI_H_