Delete simple method delegation code in CRWWebViewScrollViewProxy.

These are no longer necessary because undefined methods are delegated to
self.underlyingScrollView by default with -forwardInvocation:.

And it makes easier to preserve properties using CRWPropertiesStore by
deleting them.

Bug: 1023250
Change-Id: I3ad9fc7ccc919086dd57a019a721461736fa21f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2006843Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Hiroshi Ichikawa <ichikawa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#733894}

ios/chrome/browser/ui/fullscreen/fullscreen_web_state_list_observer_unittest.mm

@@ -32,7 +32,7 @@ namespace {
 class TestWebStateWithProxy : public web::TestWebState {
  public:
   TestWebStateWithProxy() {
-    scroll_view_proxy_ = OCMClassMock([CRWWebViewScrollViewProxy class]);
+    scroll_view_proxy_ = [[CRWWebViewScrollViewProxy alloc] init];
     id web_view_proxy_mock = OCMProtocolMock(@protocol(CRWWebViewProxy));
     [[[web_view_proxy_mock stub] andReturn:scroll_view_proxy_] scrollViewProxy];
     web_view_proxy_ = web_view_proxy_mock;

ios/web/public/ui/crw_web_view_scroll_view_proxy.h

@@ -23,6 +23,8 @@
 // TODO(crbug.com/546152): rename class to CRWContentViewScrollViewProxy.
 @interface CRWWebViewScrollViewProxy : NSObject
 
+@property(nonatomic, readonly, copy) NSArray<__kindof UIView*>* subviews;
+
 // Used by the CRWWebViewProxy to set the UIScrollView to be managed.
 - (void)setScrollView:(UIScrollView*)scrollView;
 
@@ -71,7 +73,6 @@
     UIPanGestureRecognizer* panGestureRecognizer;
 // Returns the scrollview's gesture recognizers.
 @property(weak, nonatomic, readonly) NSArray* gestureRecognizers;
-@property(nonatomic, readonly, copy) NSArray<__kindof UIView*>* subviews;
 
 - (void)addGestureRecognizer:(UIGestureRecognizer*)gestureRecognizer;
 - (void)removeGestureRecognizer:(UIGestureRecognizer*)gestureRecognizer;

ios/web/web_state/ui/crw_web_view_scroll_view_proxy.mm

@@ -173,14 +173,6 @@
   [self stopObservingScrollView:self.underlyingScrollView];
 }
 
-- (void)addGestureRecognizer:(UIGestureRecognizer*)gestureRecognizer {
-  [self.underlyingScrollView addGestureRecognizer:gestureRecognizer];
-}
-
-- (void)removeGestureRecognizer:(UIGestureRecognizer*)gestureRecognizer {
-  [self.underlyingScrollView removeGestureRecognizer:gestureRecognizer];
-}
-
 - (void)addObserver:(id<CRWWebViewScrollViewProxyObserver>)observer {
   [_observers addObserver:observer];
 }
@@ -232,27 +224,6 @@
   [_observers webViewScrollViewProxyDidSetScrollView:self];
 }
 
-- (CGRect)frame {
-  return self.underlyingScrollView ? [self.underlyingScrollView frame]
-                                   : CGRectZero;
-}
-
-- (BOOL)isScrollEnabled {
-  return [self.underlyingScrollView isScrollEnabled];
-}
-
-- (void)setScrollEnabled:(BOOL)scrollEnabled {
-  [self.underlyingScrollView setScrollEnabled:scrollEnabled];
-}
-
-- (BOOL)bounces {
-  return [self.underlyingScrollView bounces];
-}
-
-- (void)setBounces:(BOOL)bounces {
-  [self.underlyingScrollView setBounces:bounces];
-}
-
 - (BOOL)clipsToBounds {
   if (!self.underlyingScrollView && _storedClipsToBounds) {
     return *_storedClipsToBounds;
@@ -265,75 +236,6 @@
   self.underlyingScrollView.clipsToBounds = clipsToBounds;
 }
 
-- (BOOL)isDecelerating {
-  return [self.underlyingScrollView isDecelerating];
-}
-
-- (BOOL)isDragging {
-  return [self.underlyingScrollView isDragging];
-}
-
-- (BOOL)isTracking {
-  return [self.underlyingScrollView isTracking];
-}
-
-- (BOOL)isZooming {
-  return [self.underlyingScrollView isZooming];
-}
-
-- (CGFloat)zoomScale {
-  return [self.underlyingScrollView zoomScale];
-}
-
-- (void)setContentOffset:(CGPoint)contentOffset {
-  [self.underlyingScrollView setContentOffset:contentOffset];
-}
-
-- (CGPoint)contentOffset {
-  return self.underlyingScrollView ? [self.underlyingScrollView contentOffset]
-                                   : CGPointZero;
-}
-
-- (void)setContentInset:(UIEdgeInsets)contentInset {
-  [self.underlyingScrollView setContentInset:contentInset];
-}
-
-- (UIEdgeInsets)contentInset {
-  return self.underlyingScrollView ? [self.underlyingScrollView contentInset]
-                                   : UIEdgeInsetsZero;
-}
-
-- (void)setScrollIndicatorInsets:(UIEdgeInsets)scrollIndicatorInsets {
-  [self.underlyingScrollView setScrollIndicatorInsets:scrollIndicatorInsets];
-}
-
-- (UIEdgeInsets)scrollIndicatorInsets {
-  return self.underlyingScrollView
-             ? [self.underlyingScrollView scrollIndicatorInsets]
-             : UIEdgeInsetsZero;
-}
-
-- (void)setContentSize:(CGSize)contentSize {
-  [self.underlyingScrollView setContentSize:contentSize];
-}
-
-- (CGSize)contentSize {
-  return self.underlyingScrollView ? [self.underlyingScrollView contentSize]
-                                   : CGSizeZero;
-}
-
-- (void)setContentOffset:(CGPoint)contentOffset animated:(BOOL)animated {
-  [self.underlyingScrollView setContentOffset:contentOffset animated:animated];
-}
-
-- (BOOL)scrollsToTop {
-  return [self.underlyingScrollView scrollsToTop];
-}
-
-- (void)setScrollsToTop:(BOOL)scrollsToTop {
-  [self.underlyingScrollView setScrollsToTop:scrollsToTop];
-}
-
 - (UIScrollViewContentInsetAdjustmentBehavior)contentInsetAdjustmentBehavior
     API_AVAILABLE(ios(11.0)) {
   if (self.underlyingScrollView) {
@@ -345,10 +247,6 @@
   }
 }
 
-- (UIEdgeInsets)adjustedContentInset API_AVAILABLE(ios(11.0)) {
-  return [self.underlyingScrollView adjustedContentInset];
-}
-
 - (void)setContentInsetAdjustmentBehavior:
     (UIScrollViewContentInsetAdjustmentBehavior)contentInsetAdjustmentBehavior
     API_AVAILABLE(ios(11.0)) {
@@ -359,14 +257,6 @@
           contentInsetAdjustmentBehavior);
 }
 
-- (UIPanGestureRecognizer*)panGestureRecognizer {
-  return [self.underlyingScrollView panGestureRecognizer];
-}
-
-- (NSArray*)gestureRecognizers {
-  return [self.underlyingScrollView gestureRecognizers];
-}
-
 - (NSArray<__kindof UIView*>*)subviews {
   return self.underlyingScrollView ? [self.underlyingScrollView subviews] : @[];
 }