Fix broken GN build.

ppapi/tests/test_audio_encoder.cc

 // Copyright 2015 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 "ppapi/tests/test_audio_encoder.h"
 
 #include "ppapi/c/pp_codecs.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/cpp/audio_encoder.h"
 #include "ppapi/tests/testing_instance.h"
@@ skipping 13 matching lines @@
   RUN_CALLBACK_TEST(TestAudioEncoder, InitializeOpusMono, filter);
   RUN_CALLBACK_TEST(TestAudioEncoder, InitializeOpusStereo, filter);
 }
 
 std::string TestAudioEncoder::TestAvailableCodecs() {
   // Test that we get results for supported formats. We should at
   // least get the software supported formats.
   pp::AudioEncoder audio_encoder(instance_);
   ASSERT_FALSE(audio_encoder.is_null());
 
-  TestCompletionCallbackWithOutput<std::vector<PP_AudioProfileDescription>>
+  TestCompletionCallbackWithOutput<std::vector<PP_AudioProfileDescription> >
       callback(instance_->pp_instance(), false);
   callback.WaitForResult(
       audio_encoder.GetSupportedProfiles(callback.GetCallback()));
   ASSERT_GE(callback.result(), 1U);
 
   const std::vector<PP_AudioProfileDescription> audio_profiles =
       callback.output();
   ASSERT_GE(audio_profiles.size(), 1U);
 
   bool found_opus_48hz = false;
@@ skipping 89 matching lines @@
 
   ASSERT_GE(audio_encoder.GetNumberOfSamples(), 2U);
 
   TestCompletionCallbackWithOutput<pp::AudioBuffer> get_buffer(
       instance_->pp_instance(), false);
   get_buffer.WaitForResult(audio_encoder.GetBuffer(get_buffer.GetCallback()));
   ASSERT_EQ(PP_OK, get_buffer.result());
 
   PASS();
 }