Change most uses of Pickle to base::Pickle

content/browser/web_contents/web_drag_source_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 "content/browser/web_contents/web_drag_source_mac.h"
 
 #include <sys/param.h>
 
 #include "base/bind.h"
 #include "base/files/file.h"
@@ skipping 182 matching lines @@
             forType:base::mac::CFToNSCast(fileUTI_.get())];
 
   // Plain text.
   } else if ([type isEqualToString:NSStringPboardType]) {
     DCHECK(!dropData_->text.string().empty());
     [pboard setString:SysUTF16ToNSString(dropData_->text.string())
               forType:NSStringPboardType];
 
   // Custom MIME data.
   } else if ([type isEqualToString:ui::kWebCustomDataPboardType]) {
-    Pickle pickle;
+    base::Pickle pickle;
     ui::WriteCustomDataToPickle(dropData_->custom_data, &pickle);
     [pboard setData:[NSData dataWithBytes:pickle.data() length:pickle.size()]
             forType:ui::kWebCustomDataPboardType];
 
   // Dummy type.
   } else if ([type isEqualToString:ui::kChromeDragDummyPboardType]) {
     // The dummy type _was_ promised and someone decided to call the bluff.
     [pboard setData:[NSData data]
             forType:ui::kChromeDragDummyPboardType];
 
@@ skipping 243 matching lines @@
 - (NSImage*)dragImage {
   if (dragImage_)
     return dragImage_;
 
   // Default to returning a generic image.
   return content::GetContentClient()->GetNativeImageNamed(
       IDR_DEFAULT_FAVICON).ToNSImage();
 }
 
 @end  // @implementation WebDragSource (Private)