mac: History swiping doesn't work right with iframes.

content/browser/renderer_host/render_widget_host_view_mac.mm

 // Copyright (c) 2012 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.
 
 #include "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <objc/runtime.h>
 #include <QuartzCore/QuartzCore.h>
 
 #include "base/basictypes.h"
@@ skipping 140 matching lines @@
   return methodDescription.name != NULL || methodDescription.types != NULL;
 }
 
 // Private methods:
 @interface RenderWidgetHostViewCocoa ()
 @property(nonatomic, assign) NSRange selectedRange;
 @property(nonatomic, assign) NSRange markedRange;
 
 + (BOOL)shouldAutohideCursorForEvent:(NSEvent*)event;
 - (id)initWithRenderWidgetHostViewMac:(RenderWidgetHostViewMac*)r;
-- (void)gotUnhandledWheelEvent;
+- (void)processedWheelEvent:(const blink::WebMouseWheelEvent&)event
+                   consumed:(BOOL)consumed;
+
 - (void)scrollOffsetPinnedToLeft:(BOOL)left toRight:(BOOL)right;
 - (void)setHasHorizontalScrollbar:(BOOL)has_horizontal_scrollbar;
 - (void)keyEvent:(NSEvent*)theEvent wasKeyEquivalent:(BOOL)equiv;
 - (void)windowDidChangeBackingProperties:(NSNotification*)notification;
 - (void)windowChangedGlobalFrame:(NSNotification*)notification;
 - (void)drawWithDirtyRect:(CGRect)dirtyRect
                 inContext:(CGContextRef)context;
 - (void)checkForPluginImeCancellation;
 - (void)updateScreenProperties;
 - (void)setResponderDelegate:
@@ skipping 1851 matching lines @@
   CGAssociateMouseAndMouseCursorPosition(YES);
   [NSCursor unhide];
 
   if (render_widget_host_)
     render_widget_host_->LostMouseLock();
 }
 
 void RenderWidgetHostViewMac::WheelEventAck(
     const blink::WebMouseWheelEvent& event,
     InputEventAckState ack_result) {
-  if (ack_result == INPUT_EVENT_ACK_STATE_CONSUMED)
-    return;
-
+  bool consumed = ack_result == INPUT_EVENT_ACK_STATE_CONSUMED;
   // Only record a wheel event as unhandled if JavaScript handlers got a chance
   // to see it (no-op wheel events are ignored by the event dispatcher)
   if (event.deltaX || event.deltaY)
-    [cocoa_view_ gotUnhandledWheelEvent];
+    [cocoa_view_ processedWheelEvent:event consumed:consumed];
 }
 
 bool RenderWidgetHostViewMac::Send(IPC::Message* message) {
   if (render_widget_host_)
     return render_widget_host_->Send(message);
   delete message;
   return false;
 }
 
 void RenderWidgetHostViewMac::SoftwareFrameWasFreed(
@@ skipping 510 matching lines @@
   responderDelegate_.reset([delegate retain]);
 }
 
 - (void)resetCursorRects {
   if (currentCursor_) {
     [self addCursorRect:[self visibleRect] cursor:currentCursor_];
     [currentCursor_ setOnMouseEntered:YES];
   }
 }
 
-- (void)gotUnhandledWheelEvent {
-  if (responderDelegate_ &&
-      [responderDelegate_
-          respondsToSelector:@selector(gotUnhandledWheelEvent)]) {
-    [responderDelegate_ gotUnhandledWheelEvent];
-  }
+- (void)processedWheelEvent:(const blink::WebMouseWheelEvent&)event
+                   consumed:(BOOL)consumed {
+  [responderDelegate_ rendererHandledWheelEvent:event consumed:consumed];
 }
 
 - (void)scrollOffsetPinnedToLeft:(BOOL)left toRight:(BOOL)right {
   if (responderDelegate_ &&
       [responderDelegate_
           respondsToSelector:@selector(scrollOffsetPinnedToLeft:toRight:)]) {
     [responderDelegate_ scrollOffsetPinnedToLeft:left toRight:right];
   }
 }
 
@@ skipping 1798 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end