Add unit test for WebRTCInternalsMessageHandler.

content/browser/media/webrtc/webrtc_internals_unittest.cc

 // Copyright (c) 2013 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 "content/browser/media/webrtc/webrtc_internals.h"
 
 #include <memory>
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 34 matching lines @@
   std::string command_;
   std::unique_ptr<base::Value> value_;
   base::RunLoop* loop_;
 };
 
 // Derived class for testing only.  Allows the tests to have their own instance
 // for testing and control the period for which WebRTCInternals will bulk up
 // updates (changes down from 500ms to 1ms).
 class WebRTCInternalsForTest : public NON_EXPORTED_BASE(WebRTCInternals) {
  public:
-  WebRTCInternalsForTest() : WebRTCInternals(1) {}
+  WebRTCInternalsForTest() : WebRTCInternals(1, true) {}
   ~WebRTCInternalsForTest() override {}
 };
 
 }  // namespace
 
 class WebRtcInternalsTest : public testing::Test {
  public:
   WebRtcInternalsTest() : io_thread_(BrowserThread::UI, &io_loop_) {}
 
  protected:
@@ skipping 269 matching lines @@
   webrtc_internals.AddObserver(&observer);
   webrtc_internals.FileSelectionCanceled(nullptr);
 
   loop.Run();
 
   EXPECT_EQ("audioDebugRecordingsFileSelectionCancelled", observer.command());
   EXPECT_EQ(nullptr, observer.value());
 }
 
 }  // namespace content