win: fixes for Windows x64

minidump/minidump_writable.h

Index: minidump/minidump_writable.h
diff --git a/minidump/minidump_writable.h b/minidump/minidump_writable.h
index 3a6cb05c209e18d9b270280a0ba3dd4a532591f0..9e7cf71d3dd9f00ee9700d041b84bea209d5244c 100644
--- a/minidump/minidump_writable.h
+++ b/minidump/minidump_writable.h
@@ -22,6 +22,7 @@
 #include <vector>
 
 #include "base/basictypes.h"
+#include "util/file/file_io.h"
 
 namespace crashpad {
 
@@ -212,7 +213,7 @@ class MinidumpWritable {
   //!     processing when an object transitions to #kStateWritable should
   //!     implement WillWriteAtOffsetImpl(), which is called by this method.
   size_t WillWriteAtOffset(Phase phase,
-                           off_t* offset,
+                           FileOffset* offset,
                            std::vector<MinidumpWritable*>* write_sequence);
 
   //! \brief Called once an object’s writable file offset is determined, as it
@@ -232,7 +233,7 @@ class MinidumpWritable {
   //!
   //! \note Valid in #kStateFrozen. The object will transition to
   //!     #kStateWritable after this method returns.
-  virtual bool WillWriteAtOffsetImpl(off_t offset);
+  virtual bool WillWriteAtOffsetImpl(FileOffset offset);
 
   //! \brief Writes the object, transitioning it from #kStateWritable to
   //!     #kStateWritten.