Update clipboard classes to use string16 and FilePath instead of wstring....

base/pickle.h

Index: base/pickle.h
===================================================================
--- base/pickle.h	(revision 10811)
+++ base/pickle.h	(working copy)
@@ -9,6 +9,7 @@
 
 #include "base/basictypes.h"
 #include "base/logging.h"
+#include "base/string16.h"
 #include "testing/gtest/include/gtest/gtest_prod.h"
 
 // This class provides facilities for basic binary value packing and unpacking.
@@ -72,6 +73,7 @@
   bool ReadIntPtr(void** iter, intptr_t* result) const;
   bool ReadString(void** iter, std::string* result) const;
   bool ReadWString(void** iter, std::wstring* result) const;
+  bool ReadString16(void** iter, string16* result) const;
   bool ReadData(void** iter, const char** data, int* length) const;
   bool ReadBytes(void** iter, const char** data, int length) const;
 
@@ -106,6 +108,7 @@
   }
   bool WriteString(const std::string& value);
   bool WriteWString(const std::wstring& value);
+  bool WriteString16(const string16& value);
   bool WriteData(const char* data, int length);
   bool WriteBytes(const void* data, int data_len);