Renamed RTCStatsReport to RTCLegacyStatsReport in objc files.

This is to avoid a naming conflict with webrtc::RTCStatsReport that is
surfaced if you try to include it in peerconnectioninterface.h.

Background: The current stats is very much non-spec-compliant. A new
stats collection API is underway that is meant to be spec-compliant.
Some classes in Chromium and webrtc/sdk/objc have spec-compliant names
but non-spec-compliant behavior. These are being renamed to "Legacy" so
that new spec-compliant classes can be added with the correct names.

BUG=chromium:627816
TBR=tkchin@webrtc.org
NOTRY=True

Review-Url: https://codereview.webrtc.org/2313943002
Cr-Commit-Position: refs/heads/master@{#14150}

webrtc/sdk/objc/Framework/Classes/RTCLegacyStatsReport+Private.h

@@ -8,15 +8,15 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#import "WebRTC/RTCStatsReport.h"
+#import "WebRTC/RTCLegacyStatsReport.h"
 
 #include "webrtc/api/statstypes.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
-@interface RTCStatsReport ()
+@interface RTCLegacyStatsReport ()
 
-/** Initialize an RTCStatsReport object from a native StatsReport. */
+/** Initialize an RTCLegacyStatsReport object from a native StatsReport. */
 - (instancetype)initWithNativeReport:(const webrtc::StatsReport &)nativeReport;
 
 @end

webrtc/sdk/objc/Framework/Classes/RTCLegacyStatsReport.mm

@@ -8,14 +8,14 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#import "RTCStatsReport+Private.h"
+#import "RTCLegacyStatsReport+Private.h"
 
 #import "NSString+StdString.h"
 #import "WebRTC/RTCLogging.h"
 
 #include "webrtc/base/checks.h"
 
-@implementation RTCStatsReport
+@implementation RTCLegacyStatsReport
 
 @synthesize timestamp = _timestamp;
 @synthesize type = _type;
@@ -23,7 +23,7 @@
 @synthesize values = _values;
 
 - (NSString *)description {
-  return [NSString stringWithFormat:@"RTCStatsReport:\n%@\n%@\n%f\n%@",
+  return [NSString stringWithFormat:@"RTCLegacyStatsReport:\n%@\n%@\n%f\n%@",
                                     _reportId,
                                     _type,
                                     _timestamp,

webrtc/sdk/objc/Framework/Classes/RTCPeerConnection+Stats.mm

@@ -12,7 +12,7 @@
 
 #import "NSString+StdString.h"
 #import "RTCMediaStreamTrack+Private.h"
-#import "RTCStatsReport+Private.h"
+#import "RTCLegacyStatsReport+Private.h"
 
 #include "webrtc/base/checks.h"
 
@@ -21,7 +21,7 @@ namespace webrtc {
 class StatsObserverAdapter : public StatsObserver {
  public:
   StatsObserverAdapter(void (^completionHandler)
-      (NSArray<RTCStatsReport *> *stats)) {
+      (NSArray<RTCLegacyStatsReport *> *stats)) {
     completion_handler_ = completionHandler;
   }
 
@@ -33,8 +33,8 @@ class StatsObserverAdapter : public StatsObserver {
     RTC_DCHECK(completion_handler_);
     NSMutableArray *stats = [NSMutableArray arrayWithCapacity:reports.size()];
     for (const auto* report : reports) {
-      RTCStatsReport *statsReport =
-          [[RTCStatsReport alloc] initWithNativeReport:*report];
+      RTCLegacyStatsReport *statsReport =
+          [[RTCLegacyStatsReport alloc] initWithNativeReport:*report];
       [stats addObject:statsReport];
     }
     completion_handler_(stats);
@@ -42,7 +42,7 @@ class StatsObserverAdapter : public StatsObserver {
   }
 
  private:
-  void (^completion_handler_)(NSArray<RTCStatsReport *> *stats);
+  void (^completion_handler_)(NSArray<RTCLegacyStatsReport *> *stats);
 };
 }  // namespace webrtc
 
@@ -51,7 +51,7 @@ class StatsObserverAdapter : public StatsObserver {
 - (void)statsForTrack:(RTCMediaStreamTrack *)mediaStreamTrack
      statsOutputLevel:(RTCStatsOutputLevel)statsOutputLevel
     completionHandler:
-    (void (^)(NSArray<RTCStatsReport *> *stats))completionHandler {
+    (void (^)(NSArray<RTCLegacyStatsReport *> *stats))completionHandler {
   rtc::scoped_refptr<webrtc::StatsObserverAdapter> observer(
       new rtc::RefCountedObject<webrtc::StatsObserverAdapter>
           (completionHandler));

webrtc/sdk/objc/Framework/Classes/RTCPeerConnection.mm

@@ -14,13 +14,13 @@
 #import "RTCConfiguration+Private.h"
 #import "RTCDataChannel+Private.h"
 #import "RTCIceCandidate+Private.h"
+#import "RTCLegacyStatsReport+Private.h"
 #import "RTCMediaConstraints+Private.h"
 #import "RTCMediaStream+Private.h"
 #import "RTCPeerConnectionFactory+Private.h"
 #import "RTCRtpReceiver+Private.h"
 #import "RTCRtpSender+Private.h"
 #import "RTCSessionDescription+Private.h"
-#import "RTCStatsReport+Private.h"
 #import "WebRTC/RTCLogging.h"
 
 #include <memory>