Change most uses of Pickle to base::Pickle

ui/base/dragdrop/os_exchange_data_provider_mac.mm

 // Copyright 2014 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/dragdrop/os_exchange_data_provider_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
 #include "base/pickle.h"
@@ skipping 45 matching lines @@
                        forType:NSFilenamesPboardType];
 }
 
 void OSExchangeDataProviderMac::SetFilenames(
     const std::vector<FileInfo>& filenames) {
   NOTIMPLEMENTED();
 }
 
 void OSExchangeDataProviderMac::SetPickledData(
     const OSExchangeData::CustomFormat& format,
-    const Pickle& data) {
+    const base::Pickle& data) {
   NSData* ns_data = [NSData dataWithBytes:data.data() length:data.size()];
   [pasteboard_ setData:ns_data forType:format.ToNSString()];
 }
 
 bool OSExchangeDataProviderMac::GetString(base::string16* data) const {
   DCHECK(data);
   NSArray* items = [pasteboard_ readObjectsForClasses:@[ [NSString class] ]
                                               options:@{ }];
   if ([items count] == 0)
     return false;
@@ skipping 42 matching lines @@
 }
 
 bool OSExchangeDataProviderMac::GetFilenames(
     std::vector<FileInfo>* filenames) const {
   NOTIMPLEMENTED();
   return false;
 }
 
 bool OSExchangeDataProviderMac::GetPickledData(
     const OSExchangeData::CustomFormat& format,
-    Pickle* data) const {
+    base::Pickle* data) const {
   DCHECK(data);
   NSData* ns_data = [pasteboard_ dataForType:format.ToNSString()];
   if (!ns_data)
     return false;
 
-  *data = Pickle(static_cast<const char*>([ns_data bytes]), [ns_data length]);
+  *data =
+      base::Pickle(static_cast<const char*>([ns_data bytes]), [ns_data length]);
   return true;
 }
 
 bool OSExchangeDataProviderMac::HasString() const {
   NSArray* classes = @[ [NSString class] ];
   return [pasteboard_ canReadObjectForClasses:classes options:nil];
 }
 
 bool OSExchangeDataProviderMac::HasURL(
     OSExchangeData::FilenameToURLPolicy policy) const {
@@ skipping 13 matching lines @@
 
 ///////////////////////////////////////////////////////////////////////////////
 // OSExchangeData, public:
 
 // static
 OSExchangeData::Provider* OSExchangeData::CreateProvider() {
   return new OSExchangeDataProviderMac;
 }
 
 }  // namespace ui