Move Pickle to base namespace.

ui/base/dragdrop/os_exchange_data_provider_mac.h

Index: ui/base/dragdrop/os_exchange_data_provider_mac.h
diff --git a/ui/base/dragdrop/os_exchange_data_provider_mac.h b/ui/base/dragdrop/os_exchange_data_provider_mac.h
index 3488c25074b4c418f015559515b28560abcf7578..a22b3f2859ff9350e1313f996a4b3d4a8040a270 100644
--- a/ui/base/dragdrop/os_exchange_data_provider_mac.h
+++ b/ui/base/dragdrop/os_exchange_data_provider_mac.h
@@ -29,7 +29,7 @@ class UI_BASE_EXPORT OSExchangeDataProviderMac
   void SetFilename(const base::FilePath& path) override;
   void SetFilenames(const std::vector<FileInfo>& filenames) override;
   void SetPickledData(const OSExchangeData::CustomFormat& format,
-                      const Pickle& data) override;
+                      const base::Pickle& data) override;
   bool GetString(base::string16* data) const override;
   bool GetURLAndTitle(OSExchangeData::FilenameToURLPolicy policy,
                       GURL* url,
@@ -37,7 +37,7 @@ class UI_BASE_EXPORT OSExchangeDataProviderMac
   bool GetFilename(base::FilePath* path) const override;
   bool GetFilenames(std::vector<FileInfo>* filenames) const override;
   bool GetPickledData(const OSExchangeData::CustomFormat& format,
-                      Pickle* data) const override;
+                      base::Pickle* data) const override;
   bool HasString() const override;
   bool HasURL(OSExchangeData::FilenameToURLPolicy policy) const override;
   bool HasFile() const override;