Respond to CR.

// FREEBIE

Signal/src/Signal-Bridging-Header.h

@@ -18,7 +18,6 @@
 #import "OWSWebRTCDataProtos.pb.h"
 #import "PhoneManager.h"
 #import "PropertyListPreferences.h"
-#import "PureLayout.h"
 #import "PushManager.h"
 #import "RPAccountManager.h"
 #import "TSSocketManager.h"
@@ -27,6 +26,7 @@
 #import "UIUtil.h"
 #import "UIView+OWS.h"
 #import <JSQSystemSoundPlayer.h>
+#import <PureLayout/PureLayout.h>
 #import <SignalServiceKit/Contact.h>
 #import <SignalServiceKit/ContactsUpdater.h>
 #import <SignalServiceKit/Cryptography.h>

Signal/src/UIView+OWS.h

@@ -2,7 +2,7 @@
 //  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
 //
 
-#import "PureLayout.h"
+#import <PureLayout/PureLayout.h>
 #import <UIKit/UIKit.h>
 
 // A convenience method for doing responsive layout. Scales between two

Signal/src/view controllers/FullImageViewController.m

@@ -195,9 +195,9 @@
 #pragma mark - Gesture Recognizers
 
 - (void)imageDismissGesture:(UIGestureRecognizer *)sender {
-    if (sender.state == UIGestureRecognizerStateRecognized) {
-        [self dismiss];
-    }
+  if (sender.state == UIGestureRecognizerStateRecognized) {
+    [self dismiss];
+  }
 }
 
 - (void)longPressGesture:(UIGestureRecognizer *)sender {

Signal/src/view controllers/MessagesViewController.m

@@ -1238,10 +1238,6 @@ typedef enum : NSUInteger {
                                 _videoPlayer = [[MPMoviePlayerController alloc] initWithContentURL:attStream.mediaURL];
                                 [_videoPlayer prepareToPlay];
 
-                                [[NSNotificationCenter defaultCenter] addObserver:self
-                                                                         selector:@selector(moviePlayBackDidFinish:)
-                                                                             name:MPMoviePlayerPlaybackDidFinishNotification
-                                                                           object:_videoPlayer];
                                 [[NSNotificationCenter defaultCenter] addObserver:self
                                                                          selector:@selector(moviePlayerWillExitFullscreen:)
                                                                              name:MPMoviePlayerWillExitFullscreenNotification
@@ -1389,16 +1385,18 @@ typedef enum : NSUInteger {
     }
 }
 
-- (void)moviePlayBackDidFinish:(id)sender {
-    DDLogDebug(@"%@ %s", self.tag, __PRETTY_FUNCTION__);
-}
-
+// There's more than one way to exit the fullscreen video playback.
+// There's a done button, a "toggle fullscreen" button and I think
+// there's some gestures too.  These fire slightly different notifications.
+// We want to hide & clean up the video player immediately in all of
+// these cases.
 - (void)moviePlayerWillExitFullscreen:(id)sender {
     DDLogDebug(@"%@ %s", self.tag, __PRETTY_FUNCTION__);
 
     [self clearVideoPlayer];
 }
 
+// See comment on moviePlayerWillExitFullscreen:
 - (void)moviePlayerDidExitFullscreen:(id)sender {
     DDLogDebug(@"%@ %s", self.tag, __PRETTY_FUNCTION__);