Delete invalid implicit copy constructors and assignment operators

This change serves as a documentation in code, and also allows to build for
Windows with rtc_enable_symbol_export, which forces code generation of
those constructors and operators.

Author: akihikodaki

api/stats/rtc_stats_report.h

@@ -21,6 +21,7 @@
 
 #include "api/scoped_refptr.h"
 #include "api/stats/rtc_stats.h"
+#include "rtc_base/constructor_magic.h"
 #include "rtc_base/ref_count.h"
 #include "rtc_base/ref_counted_object.h"
 #include "rtc_base/system/rtc_export.h"
@@ -60,7 +61,6 @@ class RTC_EXPORT RTCStatsReport : public rtc::RefCountInterface {
   static rtc::scoped_refptr<RTCStatsReport> Create(int64_t timestamp_us = 0);
 
   explicit RTCStatsReport(int64_t timestamp_us);
-  RTCStatsReport(const RTCStatsReport& other) = delete;
   rtc::scoped_refptr<RTCStatsReport> Copy() const;
 
   int64_t timestamp_us() const { return timestamp_us_; }
@@ -114,6 +114,8 @@ class RTC_EXPORT RTCStatsReport : public rtc::RefCountInterface {
 
   int64_t timestamp_us_;
   StatsMap stats_;
+
+  RTC_DISALLOW_COPY_AND_ASSIGN(RTCStatsReport);
 };
 
 }  // namespace webrtc

media/engine/encoder_simulcast_proxy.h

@@ -25,6 +25,7 @@
 #include "api/video_codecs/video_encoder.h"
 #include "api/video_codecs/video_encoder_factory.h"
 #include "modules/video_coding/include/video_codec_interface.h"
+#include "rtc_base/constructor_magic.h"
 #include "rtc_base/system/rtc_export.h"
 
 namespace webrtc {
@@ -61,6 +62,8 @@ class RTC_EXPORT EncoderSimulcastProxy : public VideoEncoder {
   SdpVideoFormat video_format_;
   std::unique_ptr<VideoEncoder> encoder_;
   EncodedImageCallback* callback_;
+
+  RTC_DISALLOW_COPY_AND_ASSIGN(EncoderSimulcastProxy);
 };
 
 }  // namespace webrtc

media/engine/simulcast_encoder_adapter.h

@@ -24,6 +24,7 @@
 #include "api/video_codecs/video_encoder.h"
 #include "modules/video_coding/include/video_codec_interface.h"
 #include "rtc_base/atomic_ops.h"
+#include "rtc_base/constructor_magic.h"
 #include "rtc_base/synchronization/sequence_checker.h"
 #include "rtc_base/system/rtc_export.h"
 
@@ -122,6 +123,8 @@ class RTC_EXPORT SimulcastEncoderAdapter : public VideoEncoder {
 
   const absl::optional<unsigned int> experimental_boosted_screenshare_qp_;
   const bool boost_base_layer_quality_;
+
+  RTC_DISALLOW_COPY_AND_ASSIGN(SimulcastEncoderAdapter);
 };
 
 }  // namespace webrtc

p2p/base/port_allocator.h

@@ -18,6 +18,7 @@
 
 #include "p2p/base/port.h"
 #include "p2p/base/port_interface.h"
+#include "rtc_base/constructor_magic.h"
 #include "rtc_base/helpers.h"
 #include "rtc_base/proxy_info.h"
 #include "rtc_base/ssl_certificate.h"
@@ -650,6 +651,8 @@ class RTC_EXPORT PortAllocator : public sigslot::has_slots<> {
   // if ice_credentials is nullptr.
   std::vector<std::unique_ptr<PortAllocatorSession>>::const_iterator
   FindPooledSession(const IceParameters* ice_credentials = nullptr) const;
+
+  RTC_DISALLOW_COPY_AND_ASSIGN(PortAllocator);
 };
 
 }  // namespace cricket