Moved WebView(ScrollView)Proxy files to ui subdirectory.

ios/web/web_state/ui/crw_web_view_scroll_view_proxy.mm

 // Copyright 2014 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/web_state/crw_web_view_scroll_view_proxy.h"
+#import "ios/web/public/web_state/ui/crw_web_view_scroll_view_proxy.h"
 
 #import <objc/runtime.h>
 
 #include "base/auto_reset.h"
 #import "base/ios/crb_protocol_observers.h"
 #include "base/mac/foundation_util.h"
 #import "base/mac/scoped_nsobject.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
@@ skipping 168 matching lines @@
 
 - (void)scrollViewDidEndScrollingAnimation:(UIScrollView*)scrollView {
   DCHECK_EQ(_scrollView, scrollView);
   [_observers webViewScrollViewDidEndScrollingAnimation:self];
 }
 
 - (BOOL)scrollViewShouldScrollToTop:(UIScrollView*)scrollView {
   DCHECK_EQ(_scrollView, scrollView);
   __block BOOL shouldScrollToTop = YES;
   [_observers executeOnObservers:^(id observer) {
-      if ([observer respondsToSelector:@selector(
-          webViewScrollViewShouldScrollToTop:)]) {
-        shouldScrollToTop = shouldScrollToTop &&
-            [observer webViewScrollViewShouldScrollToTop:self];
-      }
+    if ([observer respondsToSelector:@selector
+                  (webViewScrollViewShouldScrollToTop:)]) {
+      shouldScrollToTop = shouldScrollToTop &&
+                          [observer webViewScrollViewShouldScrollToTop:self];
+    }
   }];
   return shouldScrollToTop;
 }
 
 - (void)scrollViewDidZoom:(UIScrollView*)scrollView {
   DCHECK_EQ(_scrollView, scrollView);
   [_observers webViewScrollViewDidZoom:self];
 }
 
 #pragma mark -
@@ skipping 15 matching lines @@
 - (void)observeValueForKeyPath:(NSString*)keyPath
                       ofObject:(id)object
                         change:(NSDictionary*)change
                        context:(void*)context {
   DCHECK_EQ(object, _scrollView);
   if ([keyPath isEqualToString:@"contentSize"])
     [_observers webViewScrollViewDidResetContentSize:self];
 }
 
 @end