Mac: implement drag-and-drop of URLs to tabs/tab strip.

chrome/browser/cocoa/tab_strip_controller.h

 // Copyright (c) 2009 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.
 
 #ifndef CHROME_BROWSER_COCOA_TAB_STRIP_CONTROLLER_H_
 #define CHROME_BROWSER_COCOA_TAB_STRIP_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include <deque>
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 // closure.
 - (BOOL)inRapidClosureMode;
 
 // Returns YES if the user is allowed to drag tabs on the strip at this moment.
 // For example, this returns NO if there are any pending tab close animtations.
 - (BOOL)tabDraggingAllowed;
 
 // Default height for tabs.
 + (CGFloat)defaultTabHeight;
 
+// Effectively an implementation of the |URLDropTargetWindowController|
+// protocol, which the |BrowserWindowController| just reflects to us. This
+// needed for dropping URLs on the tab strip.
+- (void)dropURLs:(NSArray*)urls at:(NSPoint)location;
+- (void)indicateDropURLsAt:(NSPoint)location;
+- (void)hideDropURLsIndicator;
+
 // Returns the (lazily created) window sheet controller of this window. Used
 // for the per-tab sheets.
 - (GTMWindowSheetController*)sheetController;
 
 // See comments in browser_window_controller.h for documentation about these
 // functions.
 - (BOOL)attachConstrainedWindow:(ConstrainedWindowMac*)window;
 - (void)removeConstrainedWindow:(ConstrainedWindowMac*)window;
 
 @end
 
 // Notification sent when the number of tabs changes. The object will be this
 // controller.
 extern NSString* const kTabStripNumberOfTabsChanged;
 
 #endif  // CHROME_BROWSER_COCOA_TAB_STRIP_CONTROLLER_H_