Fix glue for ClipboardHostMsg_ReadAvailableTypes.

ui/base/clipboard/clipboard_mac.mm

 // Copyright (c) 2011 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 "ui/base/clipboard/clipboard.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/file_path.h"
 #include "base/logging.h"
@@ skipping 159 matching lines @@
 
   // Safari only places RTF on the pasteboard, never HTML. We can convert RTF
   // to HTML, so the presence of either indicates success when looking for HTML.
   if ([format_ns isEqualToString:NSHTMLPboardType]) {
     return [types containsObject:NSHTMLPboardType] ||
            [types containsObject:NSRTFPboardType];
   }
   return [types containsObject:format_ns];
 }
 
+void Clipboard::ReadAvailableTypes(Clipboard::Buffer buffer,
+                                   std::vector<string16>* types,
+                                   bool* contains_filenames) const {
+  if (!types || !contains_filenames) {
+    NOTREACHED();
+    return;
+  }
+
+  // TODO(dcheng): Implement me.
+  types->clear();
+  *contains_filenames = false;
+}
+
 void Clipboard::ReadText(Clipboard::Buffer buffer, string16* result) const {
   DCHECK_EQ(buffer, BUFFER_STANDARD);
   NSPasteboard* pb = GetPasteboard();
   NSString* contents = [pb stringForType:NSStringPboardType];
 
   UTF8ToUTF16([contents UTF8String],
               [contents lengthOfBytesUsingEncoding:NSUTF8StringEncoding],
               result);
 }
 
@@ skipping 156 matching lines @@
 }
 
 // static
 Clipboard::FormatType Clipboard::GetWebKitSmartPasteFormatType() {
   static const std::string type =
       base::SysNSStringToUTF8(kWebSmartPastePboardType);
   return type;
 }
 
 }  // namespace ui