Implement WebContentsView::GetDropData for Mac; disable on Aura

content/browser/web_contents/web_contents_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.
 
 #import <Carbon/Carbon.h>
 
 #import "content/browser/web_contents/web_contents_view_mac.h"
 
 #include <string>
 
@@ skipping 28 matching lines @@
 COMPILE_ASSERT_MATCHING_ENUM(DragOperationGeneric);
 COMPILE_ASSERT_MATCHING_ENUM(DragOperationPrivate);
 COMPILE_ASSERT_MATCHING_ENUM(DragOperationMove);
 COMPILE_ASSERT_MATCHING_ENUM(DragOperationDelete);
 COMPILE_ASSERT_MATCHING_ENUM(DragOperationEvery);
 
 @interface WebContentsViewCocoa (Private)
 - (id)initWithWebContentsViewMac:(WebContentsViewMac*)w;
 - (void)registerDragTypes;
 - (void)setCurrentDragOperation:(NSDragOperation)operation;
+- (WebDropData*)dropData;
 - (void)startDragWithDropData:(const WebDropData&)dropData
             dragOperationMask:(NSDragOperation)operationMask
                         image:(NSImage*)image
                        offset:(NSPoint)offset;
 - (void)cancelDeferredClose;
 - (void)clearWebContentsView;
 - (void)closeTabAfterEvent;
 - (void)viewDidBecomeFirstResponder:(NSNotification*)notification;
 @end
 
@@ skipping 182 matching lines @@
 }
 
 bool WebContentsViewMac::IsDoingDrag() const {
   return false;
 }
 
 void WebContentsViewMac::CancelDragAndCloseTab() {
 }
 
 WebDropData* WebContentsViewMac::GetDropData() const {
-  return NULL;
+  return [cocoa_view_ dropData];
 }
 
 void WebContentsViewMac::UpdateDragCursor(WebDragOperation operation) {
   [cocoa_view_ setCurrentDragOperation: operation];
 }
 
 void WebContentsViewMac::GotFocus() {
   // This is only used in the views FocusManager stuff but it bleeds through
   // all subclasses. http://crbug.com/21875
 }
@@ skipping 173 matching lines @@
 - (void)registerDragTypes {
   NSArray* types = [NSArray arrayWithObjects:NSStringPboardType,
       NSHTMLPboardType, NSURLPboardType, nil];
   [self registerForDraggedTypes:types];
 }
 
 - (void)setCurrentDragOperation:(NSDragOperation)operation {
   [dragDest_ setCurrentOperation:operation];
 }
 
+- (WebDropData*)dropData {
+  return [dragDest_ currentDropData];
+}
+
 - (WebContentsImpl*)webContents {
   if (webContentsView_ == NULL)
     return NULL;
   return webContentsView_->web_contents();
 }
 
 - (void)mouseEvent:(NSEvent*)theEvent {
   WebContentsImpl* webContents = [self webContents];
   if (webContents && webContents->GetDelegate()) {
     NSPoint location = [NSEvent mouseLocation];
@@ skipping 119 matching lines @@
       [[[notification userInfo] objectForKey:kSelectionDirection]
         unsignedIntegerValue];
   if (direction == NSDirectSelection)
     return;
 
   [self webContents]->
       FocusThroughTabTraversal(direction == NSSelectingPrevious);
 }
 
 @end