snapshot: Add a minimal ModuleSnapshotMinidump and accessor from ProcessSnapshotMinidump

snapshot/minidump/process_snapshot_minidump.h

Index: snapshot/minidump/process_snapshot_minidump.h
diff --git a/snapshot/minidump/process_snapshot_minidump.h b/snapshot/minidump/process_snapshot_minidump.h
index 9a7f84af1eb3ee2f301c0a46f999a794e0a9e1b1..b1bf6ef8833fefb09cd40be5cbe3ba324cf05d12 100644
--- a/snapshot/minidump/process_snapshot_minidump.h
+++ b/snapshot/minidump/process_snapshot_minidump.h
@@ -26,12 +26,14 @@
 #include "base/basictypes.h"
 #include "minidump/minidump_extensions.h"
 #include "snapshot/exception_snapshot.h"
+#include "snapshot/minidump/module_snapshot_minidump.h"
 #include "snapshot/module_snapshot.h"
 #include "snapshot/process_snapshot.h"
 #include "snapshot/system_snapshot.h"
 #include "snapshot/thread_snapshot.h"
 #include "util/file/file_reader.h"
 #include "util/misc/initialization_state_dcheck.h"
+#include "util/stdlib/pointer_container.h"
 
 namespace crashpad {
 
@@ -69,9 +71,21 @@ class ProcessSnapshotMinidump final : public ProcessSnapshot {
   // Initialize().
   void InitializeCrashpadInfo();
 
+  // Initializes data carried in a MINIDUMP_MODULE_LIST stream on behalf of
+  // Initialize().
+  bool InitializeModules();
+
+  // Initializes data carried in a MinidumpModuleCrashpadInfoList structure on
+  // behalf of InitializeModules(). This makes use of MinidumpCrashpadInfo as
+  // well, so it must be called after InitializeCrashpadInfo().
+  void InitializeModulesCrashpadInfo(
+      std::map<uint32_t, MINIDUMP_LOCATION_DESCRIPTOR>*
+          module_crashpad_info_links);
+
   MINIDUMP_HEADER header_;
   std::vector<MINIDUMP_DIRECTORY> stream_directory_;
   std::map<MinidumpStreamType, const MINIDUMP_LOCATION_DESCRIPTOR*> stream_map_;
+  PointerVector<internal::ModuleSnapshotMinidump> modules_;
   MinidumpCrashpadInfo crashpad_info_;
   std::map<std::string, std::string> annotations_simple_map_;
   FileReaderInterface* file_reader_;  // weak