Add unit test for WebRTCInternalsMessageHandler.

content/browser/media/webrtc/webrtc_internals.h

Index: content/browser/media/webrtc/webrtc_internals.h
diff --git a/content/browser/media/webrtc/webrtc_internals.h b/content/browser/media/webrtc/webrtc_internals.h
index 35a1d897f070249d8279c411adf37d55799c99d4..aec660ad0c1df999dffac95f692c56754ecc145f 100644
--- a/content/browser/media/webrtc/webrtc_internals.h
+++ b/content/browser/media/webrtc/webrtc_internals.h
@@ -114,7 +114,7 @@ class CONTENT_EXPORT WebRTCInternals : public RenderProcessHostObserver,
   // instance.
   // The default ctor sets |aggregate_updates_ms| to 500ms.
   WebRTCInternals();
-  explicit WebRTCInternals(int aggregate_updates_ms);
+  WebRTCInternals(int aggregate_updates_ms, bool should_block_power_saving);
   ~WebRTCInternals() override;
 
  private:
@@ -207,6 +207,7 @@ class CONTENT_EXPORT WebRTCInternals : public RenderProcessHostObserver,
   // PowerSaveBlocker.  This prevents the application from being suspended while
   // remoting.
   std::unique_ptr<device::PowerSaveBlocker> power_save_blocker_;
+  const bool should_block_power_saving_;
 
   // Set of render process hosts that |this| is registered as an observer on.
   base::hash_set<int> render_process_id_set_;