Add constructors and operators to MediaDeviceInfo.

content/common/media/media_devices.h

Index: content/common/media/media_devices.h
diff --git a/content/common/media/media_devices.h b/content/common/media/media_devices.h
index 6ac1e2c5d7e5de67e65b00002ac59b7cb7a59ed9..a7bf705cd48d9780bc22dde25f346f9e60cf55a7 100644
--- a/content/common/media/media_devices.h
+++ b/content/common/media/media_devices.h
@@ -12,6 +12,7 @@
 
 namespace media {
 struct AudioDeviceDescription;
+struct VideoCaptureDeviceDescriptor;
 }
 
 namespace content {
@@ -24,12 +25,18 @@ enum MediaDeviceType {
 };
 
 struct CONTENT_EXPORT MediaDeviceInfo {
-  MediaDeviceInfo() = default;
+  MediaDeviceInfo();
+  MediaDeviceInfo(const MediaDeviceInfo& other);
+  MediaDeviceInfo(MediaDeviceInfo&& other);
   MediaDeviceInfo(const std::string& device_id,
                   const std::string& label,
                   const std::string& group_id);
+  explicit MediaDeviceInfo(const media::AudioDeviceDescription& description);
   explicit MediaDeviceInfo(
-      const media::AudioDeviceDescription& device_description);
+      const media::VideoCaptureDeviceDescriptor& descriptor);
+  ~MediaDeviceInfo();
+  MediaDeviceInfo& operator=(const MediaDeviceInfo& other);
+  MediaDeviceInfo& operator=(MediaDeviceInfo&& other);
 
   std::string device_id;
   std::string label;