[cast] Handle frame size changes directly in the VideoToolbox encoder (v2).

media/cast/sender/h264_vt_encoder_unittest.cc

 // 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.
 
 #include <queue>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/test/launcher/unit_test_launcher.h"
@@ skipping 190 matching lines @@
     clock_ = new base::SimpleTestTickClock();
     clock_->Advance(base::TimeTicks::Now() - base::TimeTicks());
 
     cast_environment_ = new CastEnvironment(
         scoped_ptr<base::TickClock>(clock_).Pass(),
         message_loop_.message_loop_proxy(), message_loop_.message_loop_proxy(),
         message_loop_.message_loop_proxy());
     encoder_.reset(new H264VideoToolboxEncoder(
         cast_environment_,
         video_sender_config_,
-        gfx::Size(kVideoWidth, kVideoHeight),
-        0u,
         base::Bind(&SaveOperationalStatus, &operational_status_)));
     message_loop_.RunUntilIdle();
     EXPECT_EQ(STATUS_INITIALIZED, operational_status_);
   }
 
   void TearDown() override {
     encoder_.reset();
     message_loop_.RunUntilIdle();
   }
 
@@ skipping 76 matching lines @@
   encoder_.reset();
   message_loop_.RunUntilIdle();
 
   EXPECT_EQ(5, checker->count_frames_checked());
 }
 #endif
 
 TEST_F(H264VideoToolboxEncoderTest, CheckVideoFrameFactory) {
   auto video_frame_factory = encoder_->CreateVideoFrameFactory();
   ASSERT_TRUE(video_frame_factory.get());
-  CreateFrameAndMemsetPlane(video_frame_factory.get());
-  // TODO(jfroy): Need to test that the encoder can encode VideoFrames provided
-  // by the VideoFrameFactory.
-  encoder_.reset();
+  // The first call to |MaybeCreateFrame| will return null but post a task to
+  // the encoder to initialize for the specified frame size. We then drain the
+  // message loop. After that, the encoder should have initialized and we
+  // request a frame again.
+  ASSERT_FALSE(video_frame_factory->MaybeCreateFrame(
+      gfx::Size(kVideoWidth, kVideoHeight), base::TimeDelta()));
   message_loop_.RunUntilIdle();
   CreateFrameAndMemsetPlane(video_frame_factory.get());
 }
 
 }  // namespace cast
 }  // namespace media