Revert of [Mojo Video Capture] Simplify media::VideoCaptureDevice::Client:Buffer to a struct

content/browser/renderer_host/media/video_capture_controller_unittest.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.
 
 // Unit test for VideoCaptureController.
 
 #include "content/browser/renderer_host/media/video_capture_controller.h"
 
 #include <stdint.h>
 #include <string.h>
@@ skipping 97 matching lines @@
     : public media::VideoFrameConsumerFeedbackObserver {
  public:
   MOCK_METHOD2(OnUtilizationReport,
                void(int frame_feedback_id, double utilization));
 };
 
 class MockFrameBufferPool : public media::FrameBufferPool {
  public:
   MOCK_METHOD1(SetBufferHold, void(int buffer_id));
   MOCK_METHOD1(ReleaseBufferHold, void(int buffer_id));
+  MOCK_METHOD1(GetHandleForTransit,
+               mojo::ScopedSharedBufferHandle(int buffer_id));
 };
 
 // Test class.
 class VideoCaptureControllerTest
     : public testing::Test,
       public testing::WithParamInterface<media::VideoPixelFormat> {
  public:
   VideoCaptureControllerTest() {}
   ~VideoCaptureControllerTest() override {}
 
@@ skipping 15 matching lines @@
             base::Bind(&media::VideoFrameReceiver::OnIncomingCapturedVideoFrame,
                        controller_->GetWeakPtrForIOThread()))));
     auto frame_receiver_observer = base::MakeUnique<MockFrameBufferPool>();
     mock_frame_receiver_observer_ = frame_receiver_observer.get();
     controller_->SetFrameBufferPool(std::move(frame_receiver_observer));
     auto consumer_feedback_observer =
         base::MakeUnique<MockConsumerFeedbackObserver>();
     mock_consumer_feedback_observer_ = consumer_feedback_observer.get();
     controller_->SetConsumerFeedbackObserver(
         std::move(consumer_feedback_observer));
-    client_a_.reset(
-        new MockVideoCaptureControllerEventHandler(controller_.get()));
-    client_b_.reset(
-        new MockVideoCaptureControllerEventHandler(controller_.get()));
+    client_a_.reset(new MockVideoCaptureControllerEventHandler(
+        controller_.get()));
+    client_b_.reset(new MockVideoCaptureControllerEventHandler(
+        controller_.get()));
   }
 
   void TearDown() override { base::RunLoop().RunUntilIdle(); }
 
   TestBrowserThreadBundle bundle_;
   std::unique_ptr<MockVideoCaptureControllerEventHandler> client_a_;
   std::unique_ptr<MockVideoCaptureControllerEventHandler> client_b_;
   std::unique_ptr<VideoCaptureController> controller_;
   std::unique_ptr<media::VideoCaptureDevice::Client> device_client_;
   MockFrameBufferPool* mock_frame_receiver_observer_;
@@ skipping 21 matching lines @@
   // Intentionally use the same route ID for two of the clients: the device_ids
   // are a per-VideoCaptureHost namespace, and can overlap across hosts.
   const VideoCaptureControllerID client_a_route_1(44);
   const VideoCaptureControllerID client_a_route_2(30);
   const VideoCaptureControllerID client_b_route_1(30);
   const VideoCaptureControllerID client_b_route_2(1);
 
   // Clients in controller: []
   ASSERT_EQ(0, controller_->GetClientCount())
       << "Client count should initially be zero.";
-  controller_->AddClient(client_a_route_1, client_a_.get(), 100, session_100);
+  controller_->AddClient(client_a_route_1,
+                         client_a_.get(),
+                         100,
+                         session_100);
   // Clients in controller: [A/1]
   ASSERT_EQ(1, controller_->GetClientCount())
       << "Adding client A/1 should bump client count.";
-  controller_->AddClient(client_a_route_2, client_a_.get(), 200, session_200);
+  controller_->AddClient(client_a_route_2,
+                         client_a_.get(),
+                         200,
+                         session_200);
   // Clients in controller: [A/1, A/2]
   ASSERT_EQ(2, controller_->GetClientCount())
       << "Adding client A/2 should bump client count.";
-  controller_->AddClient(client_b_route_1, client_b_.get(), 300, session_300);
+  controller_->AddClient(client_b_route_1,
+                         client_b_.get(),
+                         300,
+                         session_300);
   // Clients in controller: [A/1, A/2, B/1]
   ASSERT_EQ(3, controller_->GetClientCount())
       << "Adding client B/1 should bump client count.";
-  ASSERT_EQ(200, controller_->RemoveClient(client_a_route_2, client_a_.get()))
+  ASSERT_EQ(200,
+      controller_->RemoveClient(client_a_route_2, client_a_.get()))
       << "Removing client A/1 should return its session_id.";
   // Clients in controller: [A/1, B/1]
   ASSERT_EQ(2, controller_->GetClientCount());
   ASSERT_EQ(static_cast<int>(kInvalidMediaCaptureSessionId),
-            controller_->RemoveClient(client_a_route_2, client_a_.get()))
+      controller_->RemoveClient(client_a_route_2, client_a_.get()))
       << "Removing a nonexistant client should fail.";
   // Clients in controller: [A/1, B/1]
   ASSERT_EQ(2, controller_->GetClientCount());
-  ASSERT_EQ(300, controller_->RemoveClient(client_b_route_1, client_b_.get()))
+  ASSERT_EQ(300,
+      controller_->RemoveClient(client_b_route_1, client_b_.get()))
       << "Removing client B/1 should return its session_id.";
   // Clients in controller: [A/1]
   ASSERT_EQ(1, controller_->GetClientCount());
-  controller_->AddClient(client_b_route_2, client_b_.get(), 400, session_400);
+  controller_->AddClient(client_b_route_2,
+                         client_b_.get(),
+                         400,
+                         session_400);
   // Clients in controller: [A/1, B/2]
 
   EXPECT_CALL(*client_a_, DoEnded(client_a_route_1)).Times(1);
   controller_->StopSession(100);  // Session 100 == client A/1
   Mock::VerifyAndClearExpectations(client_a_.get());
   ASSERT_EQ(2, controller_->GetClientCount())
       << "Client should be closed but still exist after StopSession.";
   // Clients in controller: [A/1 (closed, removal pending), B/2]
   base::RunLoop().RunUntilIdle();
   // Clients in controller: [B/2]
   ASSERT_EQ(1, controller_->GetClientCount())
       << "Client A/1 should be deleted by now.";
   controller_->StopSession(200);  // Session 200 does not exist anymore
   // Clients in controller: [B/2]
   ASSERT_EQ(1, controller_->GetClientCount())
       << "Stopping non-existant session 200 should be a no-op.";
   controller_->StopSession(256);  // Session 256 never existed.
   // Clients in controller: [B/2]
   ASSERT_EQ(1, controller_->GetClientCount())
       << "Stopping non-existant session 256 should be a no-op.";
   ASSERT_EQ(static_cast<int>(kInvalidMediaCaptureSessionId),
-            controller_->RemoveClient(client_a_route_1, client_a_.get()))
+      controller_->RemoveClient(client_a_route_1, client_a_.get()))
       << "Removing already-removed client A/1 should fail.";
   // Clients in controller: [B/2]
   ASSERT_EQ(1, controller_->GetClientCount())
       << "Removing non-existant session 200 should be a no-op.";
-  ASSERT_EQ(400, controller_->RemoveClient(client_b_route_2, client_b_.get()))
+  ASSERT_EQ(400,
+      controller_->RemoveClient(client_b_route_2, client_b_.get()))
       << "Removing client B/2 should return its session_id.";
   // Clients in controller: []
   ASSERT_EQ(0, controller_->GetClientCount())
       << "Client count should return to zero after all clients are gone.";
 }
 
 // This test will connect and disconnect several clients while simulating an
 // active capture device being started and generating frames. It runs on one
 // thread and is intended to behave deterministically.
 TEST_P(VideoCaptureControllerTest, NormalCaptureMultipleClients) {
@@ skipping 11 matching lines @@
 
   media::VideoCaptureParams session_1 = session_100;
 
   media::VideoCaptureFormat device_format(gfx::Size(444, 200), 25, format);
 
   const VideoCaptureControllerID client_a_route_1(0xa1a1a1a1);
   const VideoCaptureControllerID client_a_route_2(0xa2a2a2a2);
   const VideoCaptureControllerID client_b_route_1(0xb1b1b1b1);
   const VideoCaptureControllerID client_b_route_2(0xb2b2b2b2);
 
-  controller_->AddClient(client_a_route_1, client_a_.get(), 100, session_100);
-  controller_->AddClient(client_b_route_1, client_b_.get(), 300, session_300);
-  controller_->AddClient(client_a_route_2, client_a_.get(), 200, session_200);
+  controller_->AddClient(client_a_route_1,
+                         client_a_.get(),
+                         100,
+                         session_100);
+  controller_->AddClient(client_b_route_1,
+                         client_b_.get(),
+                         300,
+                         session_300);
+  controller_->AddClient(client_a_route_2,
+                         client_a_.get(),
+                         200,
+                         session_200);
   ASSERT_EQ(3, controller_->GetClientCount());
 
   // Now, simulate an incoming captured buffer from the capture device. As a
   // side effect this will cause the first buffer to be shared with clients.
   uint8_t buffer_no = 1;
   const int arbitrary_frame_feedback_id = 101;
   ASSERT_EQ(0.0, device_client_->GetBufferPoolUtilization());
-  media::VideoCaptureDevice::Client::Buffer buffer =
-      device_client_->ReserveOutputBuffer(
-          device_format.frame_size, device_format.pixel_format,
-          device_format.pixel_storage, arbitrary_frame_feedback_id);
-  ASSERT_TRUE(buffer.is_valid());
-  auto buffer_access = buffer.handle_provider()->GetHandleForInProcessAccess();
+  std::unique_ptr<media::VideoCaptureDevice::Client::Buffer> buffer(
+      device_client_->ReserveOutputBuffer(device_format.frame_size,
+                                          device_format.pixel_format,
+                                          device_format.pixel_storage,
+                                          arbitrary_frame_feedback_id));
+  ASSERT_TRUE(buffer.get());
   ASSERT_EQ(1.0 / kPoolSize, device_client_->GetBufferPoolUtilization());
-  memset(buffer_access->data(), buffer_no++, buffer_access->mapped_size());
+  memset(buffer->data(), buffer_no++, buffer->mapped_size());
   {
     InSequence s;
     EXPECT_CALL(*client_a_, DoBufferCreated(client_a_route_1)).Times(1);
     EXPECT_CALL(*client_a_,
                 DoBufferReady(client_a_route_1, device_format.frame_size))
         .Times(1);
   }
   {
     InSequence s;
     EXPECT_CALL(*client_b_, DoBufferCreated(client_b_route_1)).Times(1);
     EXPECT_CALL(*client_b_,
                 DoBufferReady(client_b_route_1, device_format.frame_size))
         .Times(1);
   }
   {
     InSequence s;
     EXPECT_CALL(*client_a_, DoBufferCreated(client_a_route_2)).Times(1);
     EXPECT_CALL(*client_a_,
                 DoBufferReady(client_a_route_2, device_format.frame_size))
         .Times(1);
   }
   client_a_->resource_utilization_ = 0.5;
   client_b_->resource_utilization_ = -1.0;
   {
     InSequence s;
-    EXPECT_CALL(*mock_frame_receiver_observer_, SetBufferHold(buffer.id()))
+    EXPECT_CALL(*mock_frame_receiver_observer_, SetBufferHold(buffer->id()))
         .Times(1);
     // Expect VideoCaptureController to call the load observer with a
     // resource utilization of 0.5 (the largest of all reported values).
     EXPECT_CALL(*mock_consumer_feedback_observer_,
                 OnUtilizationReport(arbitrary_frame_feedback_id, 0.5))
         .Times(1);
-    EXPECT_CALL(*mock_frame_receiver_observer_, ReleaseBufferHold(buffer.id()))
+    EXPECT_CALL(*mock_frame_receiver_observer_, ReleaseBufferHold(buffer->id()))
         .Times(1);
   }
 
-  device_client_->OnIncomingCapturedBuffer(std::move(buffer), device_format,
-                                           arbitrary_reference_time_,
-                                           arbitrary_timestamp_);
+  device_client_->OnIncomingCapturedBuffer(std::move(buffer),
+    device_format,
+    arbitrary_reference_time_,
+    arbitrary_timestamp_);
 
   base::RunLoop().RunUntilIdle();
   Mock::VerifyAndClearExpectations(client_a_.get());
   Mock::VerifyAndClearExpectations(client_b_.get());
   Mock::VerifyAndClearExpectations(mock_consumer_feedback_observer_);
   Mock::VerifyAndClearExpectations(mock_frame_receiver_observer_);
 
   // Second buffer which ought to use the same shared memory buffer. In this
   // case pretend that the Buffer pointer is held by the device for a long
   // delay. This shouldn't affect anything.
   const int arbitrary_frame_feedback_id_2 = 102;
-  media::VideoCaptureDevice::Client::Buffer buffer2 =
-      device_client_->ReserveOutputBuffer(
-          device_format.frame_size, device_format.pixel_format,
-          device_format.pixel_storage, arbitrary_frame_feedback_id_2);
-  ASSERT_TRUE(buffer2.is_valid());
-  auto buffer2_access =
-      buffer2.handle_provider()->GetHandleForInProcessAccess();
-  memset(buffer2_access->data(), buffer_no++, buffer2_access->mapped_size());
+  std::unique_ptr<media::VideoCaptureDevice::Client::Buffer> buffer2 =
+      device_client_->ReserveOutputBuffer(device_format.frame_size,
+                                          device_format.pixel_format,
+                                          device_format.pixel_storage,
+                                          arbitrary_frame_feedback_id_2);
+  ASSERT_TRUE(buffer2.get());
+  memset(buffer2->data(), buffer_no++, buffer2->mapped_size());
   client_a_->resource_utilization_ = 0.5;
   client_b_->resource_utilization_ = 3.14;
   // Expect VideoCaptureController to call the load observer with a
   // resource utilization of 3.14 (the largest of all reported values).
   {
     InSequence s;
-    EXPECT_CALL(*mock_frame_receiver_observer_, SetBufferHold(buffer2.id()))
+    EXPECT_CALL(*mock_frame_receiver_observer_, SetBufferHold(buffer2->id()))
         .Times(1);
     // Expect VideoCaptureController to call the load observer with a
     // resource utilization of 3.14 (the largest of all reported values).
     EXPECT_CALL(*mock_consumer_feedback_observer_,
                 OnUtilizationReport(arbitrary_frame_feedback_id_2, 3.14))
         .Times(1);
-    EXPECT_CALL(*mock_frame_receiver_observer_, ReleaseBufferHold(buffer2.id()))
+    EXPECT_CALL(*mock_frame_receiver_observer_,
+                ReleaseBufferHold(buffer2->id()))
         .Times(1);
   }
 
-  device_client_->OnIncomingCapturedBuffer(std::move(buffer2), device_format,
-                                           arbitrary_reference_time_,
-                                           arbitrary_timestamp_);
+  device_client_->OnIncomingCapturedBuffer(std::move(buffer2),
+    device_format,
+    arbitrary_reference_time_,
+    arbitrary_timestamp_);
 
   // The buffer should be delivered to the clients in any order.
   {
     InSequence s;
     EXPECT_CALL(*client_a_, DoBufferCreated(client_a_route_1)).Times(1);
     EXPECT_CALL(*client_a_,
                 DoBufferReady(client_a_route_1, device_format.frame_size))
         .Times(1);
   }
   {
@@ skipping 10 matching lines @@
                 DoBufferReady(client_a_route_2, device_format.frame_size))
         .Times(1);
   }
   base::RunLoop().RunUntilIdle();
   Mock::VerifyAndClearExpectations(client_a_.get());
   Mock::VerifyAndClearExpectations(client_b_.get());
   Mock::VerifyAndClearExpectations(mock_consumer_feedback_observer_);
   Mock::VerifyAndClearExpectations(mock_frame_receiver_observer_);
 
   // Add a fourth client now that some buffers have come through.
-  controller_->AddClient(client_b_route_2, client_b_.get(), 1, session_1);
+  controller_->AddClient(client_b_route_2,
+                         client_b_.get(),
+                         1,
+                         session_1);
   Mock::VerifyAndClearExpectations(client_b_.get());
 
   // Third, fourth, and fifth buffers. Pretend they all arrive at the same time.
   for (int i = 0; i < kPoolSize; i++) {
     const int arbitrary_frame_feedback_id = 200 + i;
-    media::VideoCaptureDevice::Client::Buffer buffer =
-        device_client_->ReserveOutputBuffer(
-            device_format.frame_size, device_format.pixel_format,
-            device_format.pixel_storage, arbitrary_frame_feedback_id);
-    ASSERT_TRUE(buffer.is_valid());
-    auto buffer_access =
-        buffer.handle_provider()->GetHandleForInProcessAccess();
-    memset(buffer_access->data(), buffer_no++, buffer_access->mapped_size());
-    device_client_->OnIncomingCapturedBuffer(std::move(buffer), device_format,
-                                             arbitrary_reference_time_,
-                                             arbitrary_timestamp_);
+    std::unique_ptr<media::VideoCaptureDevice::Client::Buffer> buffer =
+        device_client_->ReserveOutputBuffer(device_format.frame_size,
+                                            device_format.pixel_format,
+                                            device_format.pixel_storage,
+                                            arbitrary_frame_feedback_id);
+    ASSERT_TRUE(buffer.get());
+    memset(buffer->data(), buffer_no++, buffer->mapped_size());
+    device_client_->OnIncomingCapturedBuffer(std::move(buffer),
+      device_format,
+      arbitrary_reference_time_,
+      arbitrary_timestamp_);
   }
   // ReserveOutputBuffer ought to fail now, because the pool is depleted.
   ASSERT_FALSE(device_client_
-                   ->ReserveOutputBuffer(
-                       device_format.frame_size, device_format.pixel_format,
-                       device_format.pixel_storage, arbitrary_frame_feedback_id)
-                   .is_valid());
+                   ->ReserveOutputBuffer(device_format.frame_size,
+                                         device_format.pixel_format,
+                                         device_format.pixel_storage,
+                                         arbitrary_frame_feedback_id)
+                   .get());
 
   // The new client needs to be notified of the creation of |kPoolSize| buffers;
   // the old clients only |kPoolSize - 2|.
   EXPECT_CALL(*client_b_, DoBufferCreated(client_b_route_2)).Times(kPoolSize);
   EXPECT_CALL(*client_b_,
               DoBufferReady(client_b_route_2, device_format.frame_size))
       .Times(kPoolSize);
   EXPECT_CALL(*client_a_, DoBufferCreated(client_a_route_1))
       .Times(kPoolSize - 2);
   EXPECT_CALL(*client_a_,
@@ skipping 13 matching lines @@
   Mock::VerifyAndClearExpectations(client_a_.get());
   Mock::VerifyAndClearExpectations(client_b_.get());
 
   // Now test the interaction of client shutdown and buffer delivery.
   // Kill A1 via renderer disconnect (synchronous).
   controller_->RemoveClient(client_a_route_1, client_a_.get());
   // Kill B1 via session close (posts a task to disconnect).
   EXPECT_CALL(*client_b_, DoEnded(client_b_route_1)).Times(1);
   controller_->StopSession(300);
   // Queue up another buffer.
-  media::VideoCaptureDevice::Client::Buffer buffer3 =
-      device_client_->ReserveOutputBuffer(
-          device_format.frame_size, device_format.pixel_format,
-          device_format.pixel_storage, arbitrary_frame_feedback_id);
-  ASSERT_TRUE(buffer3.is_valid());
-  auto buffer3_access =
-      buffer3.handle_provider()->GetHandleForInProcessAccess();
-  memset(buffer3_access->data(), buffer_no++, buffer3_access->mapped_size());
-  device_client_->OnIncomingCapturedBuffer(std::move(buffer3), device_format,
-                                           arbitrary_reference_time_,
-                                           arbitrary_timestamp_);
+  std::unique_ptr<media::VideoCaptureDevice::Client::Buffer> buffer3 =
+      device_client_->ReserveOutputBuffer(device_format.frame_size,
+                                          device_format.pixel_format,
+                                          device_format.pixel_storage,
+                                          arbitrary_frame_feedback_id);
+  ASSERT_TRUE(buffer3.get());
+  memset(buffer3->data(), buffer_no++, buffer3->mapped_size());
+  device_client_->OnIncomingCapturedBuffer(std::move(buffer3),
+    device_format,
+    arbitrary_reference_time_,
+    arbitrary_timestamp_);
 
-  media::VideoCaptureDevice::Client::Buffer buffer4 =
-      device_client_->ReserveOutputBuffer(
-          device_format.frame_size, device_format.pixel_format,
-          device_format.pixel_storage, arbitrary_frame_feedback_id);
+  std::unique_ptr<media::VideoCaptureDevice::Client::Buffer> buffer4 =
+      device_client_->ReserveOutputBuffer(device_format.frame_size,
+                                          device_format.pixel_format,
+                                          device_format.pixel_storage,
+                                          arbitrary_frame_feedback_id);
   {
     // Kill A2 via session close (posts a task to disconnect, but A2 must not
     // be sent either of these two buffers).
     EXPECT_CALL(*client_a_, DoEnded(client_a_route_2)).Times(1);
     controller_->StopSession(200);
   }
-  ASSERT_TRUE(buffer4.is_valid());
-  auto buffer4_access =
-      buffer4.handle_provider()->GetHandleForInProcessAccess();
-  memset(buffer4_access->data(), buffer_no++, buffer4_access->mapped_size());
-  device_client_->OnIncomingCapturedBuffer(std::move(buffer4), device_format,
-                                           arbitrary_reference_time_,
-                                           arbitrary_timestamp_);
+  ASSERT_TRUE(buffer4.get());
+  memset(buffer4->data(), buffer_no++, buffer4->mapped_size());
+  device_client_->OnIncomingCapturedBuffer(std::move(buffer4),
+    device_format,
+    arbitrary_reference_time_,
+    arbitrary_timestamp_);
   // B2 is the only client left, and is the only one that should
   // get the buffer.
   EXPECT_CALL(*client_b_,
               DoBufferReady(client_b_route_2, device_format.frame_size))
       .Times(2);
   base::RunLoop().RunUntilIdle();
   Mock::VerifyAndClearExpectations(client_a_.get());
   Mock::VerifyAndClearExpectations(client_b_.get());
 }
 
@@ skipping 25 matching lines @@
   // Second client connects after the error state. It also should get told of
   // the error.
   EXPECT_CALL(*client_b_, DoError(route_id)).Times(1);
   controller_->AddClient(route_id, client_b_.get(), 200, session_200);
   base::RunLoop().RunUntilIdle();
   Mock::VerifyAndClearExpectations(client_b_.get());
 
   media::VideoCaptureFormat device_format(
       capture_resolution, arbitrary_frame_rate_, media::PIXEL_FORMAT_I420,
       media::PIXEL_STORAGE_CPU);
-  const int arbitrary_frame_feedback_id = 101;
-  media::VideoCaptureDevice::Client::Buffer buffer =
-      device_client_->ReserveOutputBuffer(
-          device_format.frame_size, device_format.pixel_format,
-          device_format.pixel_storage, arbitrary_frame_feedback_id);
-  device_client_->OnIncomingCapturedBuffer(std::move(buffer), device_format,
-                                           arbitrary_reference_time_,
-                                           arbitrary_timestamp_);
+    const int arbitrary_frame_feedback_id = 101;
+  std::unique_ptr<media::VideoCaptureDevice::Client::Buffer> buffer(
+      device_client_->ReserveOutputBuffer(device_format.frame_size,
+                                          device_format.pixel_format,
+                                          device_format.pixel_storage,
+                                          arbitrary_frame_feedback_id));
+  device_client_->OnIncomingCapturedBuffer(std::move(buffer),
+    device_format,
+    arbitrary_reference_time_,
+    arbitrary_timestamp_);
 
   base::RunLoop().RunUntilIdle();
 }
 
 // Exercises the OnError() codepath of VideoCaptureController, and tests the
 // behavior of various operations after the error state has been signalled.
 TEST_F(VideoCaptureControllerTest, ErrorAfterDeviceCreation) {
   media::VideoCaptureParams session_100;
   session_100.requested_format = media::VideoCaptureFormat(
       gfx::Size(320, 240), 30, media::PIXEL_FORMAT_I420);
 
   media::VideoCaptureParams session_200 = session_100;
 
   const VideoCaptureControllerID route_id(0x99);
 
   // Start with one client.
   controller_->AddClient(route_id, client_a_.get(), 100, session_100);
 
   // Start the device. Then, before the first buffer, signal an error and
   // deliver the buffer. The error should be propagated to clients; the buffer
   // should not be.
   base::RunLoop().RunUntilIdle();
   Mock::VerifyAndClearExpectations(client_a_.get());
 
   media::VideoCaptureFormat device_format(
       gfx::Size(10, 10), arbitrary_frame_rate_, media::PIXEL_FORMAT_I420);
   const int arbitrary_frame_feedback_id = 101;
-  media::VideoCaptureDevice::Client::Buffer buffer =
-      device_client_->ReserveOutputBuffer(
-          device_format.frame_size, device_format.pixel_format,
-          device_format.pixel_storage, arbitrary_frame_feedback_id);
-  ASSERT_TRUE(buffer.is_valid());
+  std::unique_ptr<media::VideoCaptureDevice::Client::Buffer> buffer(
+      device_client_->ReserveOutputBuffer(device_format.frame_size,
+                                          device_format.pixel_format,
+                                          device_format.pixel_storage,
+                                          arbitrary_frame_feedback_id));
+  ASSERT_TRUE(buffer.get());
 
   device_client_->OnError(FROM_HERE, "Test Error");
-  device_client_->OnIncomingCapturedBuffer(std::move(buffer), device_format,
-                                           arbitrary_reference_time_,
-                                           arbitrary_timestamp_);
+  device_client_->OnIncomingCapturedBuffer(std::move(buffer),
+    device_format,
+    arbitrary_reference_time_,
+    arbitrary_timestamp_);
 
   EXPECT_CALL(*client_a_, DoError(route_id)).Times(1);
   base::RunLoop().RunUntilIdle();
   Mock::VerifyAndClearExpectations(client_a_.get());
 
   // Second client connects after the error state. It also should get told of
   // the error.
   EXPECT_CALL(*client_b_, DoError(route_id)).Times(1);
   controller_->AddClient(route_id, client_b_.get(), 200, session_200);
   Mock::VerifyAndClearExpectations(client_b_.get());
 }
 
 }  // namespace content