win: Make reading CrashpadInfo work across bitness

snapshot/win/pe_image_reader.h

Index: snapshot/win/pe_image_reader.h
diff --git a/snapshot/win/pe_image_reader.h b/snapshot/win/pe_image_reader.h
index 716d47fb3e8ba6489e32af72e9719137af73ec6a..73a9e3823b30315796c706f626b333daf2e87cb2 100644
--- a/snapshot/win/pe_image_reader.h
+++ b/snapshot/win/pe_image_reader.h
@@ -24,6 +24,7 @@
 #include "util/misc/uuid.h"
 #include "util/win/address_types.h"
 #include "util/win/checked_win_address_range.h"
+#include "util/win/process_structs.h"
 
 namespace crashpad {
 
@@ -31,7 +32,7 @@ class ProcessReaderWin;
 
 namespace process_types {
 
-// TODO(scottmg): Genericize and/or? move process_types out of mac/.
+template <class Traits>
 struct CrashpadInfo {
   uint32_t signature;
   uint32_t size;
@@ -39,10 +40,7 @@ struct CrashpadInfo {
   uint8_t crashpad_handler_behavior;  // TriState.
   uint8_t system_crash_reporter_forwarding;  // TriState.
   uint16_t padding_0;
-  uint64_t simple_annotations;  // TODO(scottmg): x86/64.
-};
-
-struct Section {
+  typename Traits::Pointer simple_annotations;
 };
 
 }  // namespace process_types
@@ -92,7 +90,9 @@ class PEImageReader {
   //! \return `true` on success, `false` on failure. If the module does not have
   //!     a `CPADinfo` section, this will return `false` without logging any
   //!     messages. Other failures will result in messages being logged.
-  bool GetCrashpadInfo(process_types::CrashpadInfo* crashpad_info) const;
+  template <class Traits>
+  bool GetCrashpadInfo(
+      process_types::CrashpadInfo<Traits>* crashpad_info) const;
 
   //! \brief Obtains information from the module's debug directory, if any.
   //!