[ios] Moved all web mocks to ios/web/public/test/fakes.

ios/web/public/test/test_native_content.mm

-// Copyright 2016 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/public/test/test_native_content.h"
-
-#import "base/mac/scoped_nsobject.h"
-
-@implementation TestNativeContent {
-  GURL _URL;
-  GURL _virtualURL;
-  base::scoped_nsobject<UIView> _view;
-}
-- (instancetype)initWithURL:(const GURL&)URL
-                 virtualURL:(const GURL&)virtualURL {
-  self = [super init];
-  if (self) {
-    _URL = URL;
-    _virtualURL = virtualURL;
-  }
-  return self;
-}
-
-- (BOOL)respondsToSelector:(SEL)selector {
-  if (selector == @selector(virtualURL)) {
-    return _virtualURL.is_valid();
-  }
-  return [super respondsToSelector:selector];
-}
-
-- (NSString*)title {
-  return @"Test Title";
-}
-
-- (const GURL&)url {
-  return _URL;
-}
-
-- (GURL)virtualURL {
-  return _virtualURL;
-}
-
-- (UIView*)view {
-  return nil;
-}
-
-- (void)handleLowMemory {
-}
-
-- (BOOL)isViewAlive {
-  return YES;
-}
-
-- (void)reload {
-}
-@end