win: fixes for Windows x64

minidump/minidump_writable_test.cc

Index: minidump/minidump_writable_test.cc
diff --git a/minidump/minidump_writable_test.cc b/minidump/minidump_writable_test.cc
index 184ac71e71aa91926a5653f4802b65a2d7446783..38d97de34da82cd4efc6e24b1f1391f5cbd5310c 100644
--- a/minidump/minidump_writable_test.cc
+++ b/minidump/minidump_writable_test.cc
@@ -89,7 +89,7 @@ class BaseTestMinidumpWritable : public crashpad::internal::MinidumpWritable {
     return has_phase_ ? phase_ : MinidumpWritable::Phase();
   }
 
-  bool WillWriteAtOffsetImpl(off_t offset) override {
+  bool WillWriteAtOffsetImpl(FileOffset offset) override {
     EXPECT_EQ(state(), kStateFrozen);
     expected_offset_ = offset;
     bool rv = MinidumpWritable::WillWriteAtOffsetImpl(offset);
@@ -107,7 +107,7 @@ class BaseTestMinidumpWritable : public crashpad::internal::MinidumpWritable {
 
  private:
   std::vector<BaseTestMinidumpWritable*> children_;
-  off_t expected_offset_;
+  FileOffset expected_offset_;
   size_t alignment_;
   Phase phase_;
   bool has_alignment_;