Correct iOS build for latest Xcode beta.

ios/web/web_state/ui/crw_web_controller_container_view.mm

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/web/web_state/ui/crw_web_controller_container_view.h"
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
 
 #pragma mark - CRWToolbarContainerView
@@ skipping 79 matching lines @@
 
 // Container view that displays any added toolbars.  It is always the top-most
 // subview, and is bottom aligned with the CRWWebControllerContainerView.
 @property(nonatomic, retain, readonly)
     CRWToolbarContainerView* toolbarContainerView;
 
 @end
 
 @implementation CRWWebControllerContainerView
 
-- (instancetype)init {
-  NOTREACHED();
-  return nil;
-}
-
 - (instancetype)initWithFrame:(CGRect)frame {
   self = [super initWithFrame:frame];
   if (self) {
     self.backgroundColor = [UIColor whiteColor];
     self.autoresizingMask =
         UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
   }
   return self;
 }
 
+- (instancetype)init {
+  NOTREACHED();
+  return nil;
+}
+
 #pragma mark Accessors
 
 - (void)setToolbarContainerView:(CRWToolbarContainerView*)toolbarContainerView {
   if (![_toolbarContainerView isEqual:toolbarContainerView]) {
     [_toolbarContainerView removeFromSuperview];
     _toolbarContainerView.reset([toolbarContainerView retain]);
     [self addSubview:_toolbarContainerView];
   }
 }
 
@@ skipping 45 matching lines @@
   else
     self.toolbarContainerView = nil;
 }
 
 - (void)removeAllToolbars {
   // Resetting the property will remove the toolbars from the hierarchy.
   self.toolbarContainerView = nil;
 }
 
 @end