Add AndroidVideoSurfaceChooser to manage overlays.

media/base/android/mock_android_overlay.h

+// Copyright 2017 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 MEDIA_BASE_ANDROID_MOCK_ANDROID_OVERLAY_H_
+#define MEDIA_BASE_ANDROID_MOCK_ANDROID_OVERLAY_H_
+
+#include "media/base/android/android_overlay.h"
+
+#include "base/callback.h"
+#include "base/memory/weak_ptr.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+namespace media {
+
+// AndroidOverlay implementation that supports weak ptrs.
+class MockAndroidOverlay : public ::testing::StrictMock<AndroidOverlay> {
+ private:
+  class DestructionObserverInterface {
+   public:
+    DestructionObserverInterface() = default;
+    virtual ~DestructionObserverInterface() {}
+
+    // Called when the overlay is destroyed.  Feel free to set
+    // expectations on it.
+    virtual void OnOverlayDestroyed() = 0;
+
+   private:
+    DISALLOW_COPY_AND_ASSIGN(DestructionObserverInterface);
+  };
+
+ public:
+  MockAndroidOverlay();
+  ~MockAndroidOverlay() override;
+
+  MOCK_METHOD1(ScheduleLayout, void(const gfx::Rect&));
+  MOCK_CONST_METHOD0(GetJavaSurface, base::android::JavaRef<jobject>&());
+

[DaleCurtis, 2017/04/25 23:25:33]

Why not just MOCK_METHOD0(OnOverlayDestroyed)) that is always called from
~MockAndroidOverlay? I'm a bit confused on why the full destruction observer is
necessary.

[liberato (no reviews please), 2017/04/26 17:53:57]

how would one set the expectation in the test?  we give up ownership of the
object as part of the API.

i guess i could keep a raw ptr, but that seems like exactly the problem that a
weakref is supposed to solve.

same for MockOverlayFactory.

[DaleCurtis, 2017/04/26 18:28:10]

You have to set expectations before destruction anyways with a strict mock, so
if things are working correctly the raw pointer is always alive.

[liberato (no reviews please), 2017/04/27 18:30:12]

(per offline discussion)

+  // Set |config_|.  Sometimes, it's convenient to do this after construction,
+  // especially if one must create the overlay before the factory provides it
+  // via CreateOverlay.  That's helpful to set test expectations.
+  void SetConfig(const Config& config);
+
+  // Set of callbacks that we provide to control the overlay once you've handed
+  // off ownership of it.  Will return false if the overlay has been destroyed.
+  using ControlCallback = base::Callback<bool()>;
+  struct Callbacks {
+    Callbacks();
+    Callbacks(const Callbacks&);
+    ~Callbacks();
+
+    ControlCallback OverlayReady;
+    ControlCallback OverlayFailed;
+    ControlCallback SurfaceDestroyed;
+  };
+
+  // Return callbacks that can be used to control the overlay.
+  Callbacks GetCallbacks();
+
+  // Set a callback that will be called when |this| is deleted.  Replaces any
+  // previous callback.
+  void SetDestructionCallback(const base::Closure& destruction_cb);
+
+  // Mock that calls OnOverlayDestroyed when the overlay is destroyed.  This
+  // will replace the destruction callback on the mock.
+  class DestructionObserver : StrictMock<DestructionObserverInterface> {
+   protected:
+    DestructionObserver(MockAndroidOverlay*);
+
+   public:
+    ~DestructionObserver();
+
+    // Called when the overlay is destroyed.  Feel free to set
+    // expectations on it.
+    MOCK_METHOD0(OnOverlayDestroyed, void());
+
+   private:
+    friend class MockAndroidOverlay;
+
+    base::WeakPtrFactory<DestructionObserver> weak_factory_;
+
+    DISALLOW_COPY_AND_ASSIGN(DestructionObserver);
+  };
+
+  // Create a DestructionObserver for us.  There can be only one.
+  std::unique_ptr<DestructionObserver> CreateDestructionObserver();
+
+ private:
+  // Trampoline to promote |wp| and call |cb|, or return false.
+  static bool CallbackTrampoline(void (MockAndroidOverlay::*cb)(),
+                                 base::WeakPtr<MockAndroidOverlay> wp);
+
+  // Send callbacks.
+  void OnOverlayReady();
+  void OnOverlayFailed();
+  void OnSurfaceDestroyed();
+
+  base::WeakPtr<MockAndroidOverlay> GetWeakPtr();

[DaleCurtis, 2017/04/25 23:25:33]

No point if private?

[liberato (no reviews please), 2017/04/26 17:53:57]

removed, see comment in avda.h

+
+  // Initial configuration, mostly for callbacks.
+  Config config_;
+
+  base::Closure destruction_cb_;
+
+  base::WeakPtrFactory<MockAndroidOverlay> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockAndroidOverlay);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_BASE_ANDROID_MOCK_ANDROID_OVERLAY_H_