[mac] Implement dragging of multiple tabs.

chrome/browser/ui/cocoa/tabs/tab_window_controller.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 "chrome/browser/ui/cocoa/tabs/tab_window_controller.h"
 
 #include "base/logging.h"
 #import "chrome/browser/ui/cocoa/fast_resize_view.h"
 #import "chrome/browser/ui/cocoa/framed_browser_window.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_view.h"
@@ skipping 169 matching lines @@
   // window's size, as our overlay window doesn't know how to resize properly.
   return overlayWindow_ == nil;
 }
 
 - (BOOL)canReceiveFrom:(TabWindowController*)source {
   // subclass must implement
   NOTIMPLEMENTED();
   return NO;
 }
 
-- (void)moveTabView:(NSView*)view
-     fromController:(TabWindowController*)dragController {
+- (void)moveTabViews:(NSArray*)views
+      fromController:(TabWindowController*)dragController {
   NOTIMPLEMENTED();
 }
 
+- (NSArray*)tabViews {
+  NOTIMPLEMENTED();
+  return nil;
+}
+
 - (NSView*)activeTabView {
   NOTIMPLEMENTED();
   return nil;
 }
 
 - (void)layoutTabs {
   // subclass must implement
   NOTIMPLEMENTED();
 }
 
-- (TabWindowController*)detachTabToNewWindow:(TabView*)tabView {
+- (TabWindowController*)detachTabsToNewWindow:(NSArray*)tabViews
+                                   draggedTab:(NSView*)draggedTab {
   // subclass must implement
   NOTIMPLEMENTED();
   return NULL;
 }
 
 - (void)insertPlaceholderForTab:(TabView*)tab frame:(NSRect)frame {
   [self showNewTabButton:NO];
 }
 
 - (void)removePlaceholder {
@@ skipping 69 matching lines @@
   closeDeferred_ = YES;
 }
 
 // Called when the size of the window content area has changed. Override to
 // position specific views. Base class implementation does nothing.
 - (void)layoutSubviews {
   NOTIMPLEMENTED();
 }
 
 @end