[mac] Implement dragging of multiple tabs.

chrome/browser/ui/cocoa/tabs/tab_window_controller.mm

Index: chrome/browser/ui/cocoa/tabs/tab_window_controller.mm
diff --git a/chrome/browser/ui/cocoa/tabs/tab_window_controller.mm b/chrome/browser/ui/cocoa/tabs/tab_window_controller.mm
index c3cc590b7d67b83b2fd86084d601d824f4ca187d..97c527a7ea929f88adb9402fc8ab7858b91c6d52 100644
--- a/chrome/browser/ui/cocoa/tabs/tab_window_controller.mm
+++ b/chrome/browser/ui/cocoa/tabs/tab_window_controller.mm
@@ -187,11 +187,16 @@
   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;
@@ -202,7 +207,8 @@
   NOTIMPLEMENTED();
 }
 
-- (TabWindowController*)detachTabToNewWindow:(TabView*)tabView {
+- (TabWindowController*)detachTabsToNewWindow:(NSArray*)tabViews
+                                   draggedTab:(NSView*)draggedTab {
   // subclass must implement
   NOTIMPLEMENTED();
   return NULL;