Move Pickle to base namespace.

ui/base/dragdrop/os_exchange_data_provider_aurax11.h

Index: ui/base/dragdrop/os_exchange_data_provider_aurax11.h
diff --git a/ui/base/dragdrop/os_exchange_data_provider_aurax11.h b/ui/base/dragdrop/os_exchange_data_provider_aurax11.h
index 4d6a95f65694f8b2846f05734dd1823e477e1cf2..959b6a68aa1ee048a4c4c28410d7db6aade207e4 100644
--- a/ui/base/dragdrop/os_exchange_data_provider_aurax11.h
+++ b/ui/base/dragdrop/os_exchange_data_provider_aurax11.h
@@ -69,7 +69,7 @@ class UI_BASE_EXPORT OSExchangeDataProviderAuraX11
   void SetFilename(const base::FilePath& path) override;
   void SetFilenames(const std::vector<FileInfo>& filenames) override;
   void SetPickledData(const OSExchangeData::CustomFormat& format,
-                      const Pickle& pickle) override;
+                      const base::Pickle& pickle) override;
   bool GetString(base::string16* data) const override;
   bool GetURLAndTitle(OSExchangeData::FilenameToURLPolicy policy,
                       GURL* url,
@@ -77,7 +77,7 @@ class UI_BASE_EXPORT OSExchangeDataProviderAuraX11
   bool GetFilename(base::FilePath* path) const override;
   bool GetFilenames(std::vector<FileInfo>* filenames) const override;
   bool GetPickledData(const OSExchangeData::CustomFormat& format,
-                      Pickle* pickle) const override;
+                      base::Pickle* pickle) const override;
   bool HasString() const override;
   bool HasURL(OSExchangeData::FilenameToURLPolicy policy) const override;
   bool HasFile() const override;
@@ -101,7 +101,7 @@ class UI_BASE_EXPORT OSExchangeDataProviderAuraX11
 
  private:
   friend class OSExchangeDataProviderAuraX11Test;
-  typedef std::map<OSExchangeData::CustomFormat, Pickle>  PickleData;
+  typedef std::map<OSExchangeData::CustomFormat, base::Pickle> PickleData;
 
   // Returns true if |formats_| contains a string format and the string can be
   // parsed as a URL.