win: Implement exception snapshot

snapshot/win/process_snapshot_win.cc

Index: snapshot/win/process_snapshot_win.cc
diff --git a/snapshot/win/process_snapshot_win.cc b/snapshot/win/process_snapshot_win.cc
index b25e8caa1079f2267babe3e53543020338af56e2..0b88772c42ed6f6668b460202a78037f2b1a6cef 100644
--- a/snapshot/win/process_snapshot_win.cc
+++ b/snapshot/win/process_snapshot_win.cc
@@ -24,7 +24,7 @@ ProcessSnapshotWin::ProcessSnapshotWin()
       system_(),
       threads_(),
       modules_(),
-      // TODO(scottmg): exception_(),
+      exception_(),
       process_reader_(),
       report_id_(),
       client_id_(),
@@ -53,6 +53,21 @@ bool ProcessSnapshotWin::Initialize(HANDLE process) {
   return true;
 }
 
+bool ProcessSnapshotWin::InitializeException(
+    HANDLE thread,
+    EXCEPTION_POINTERS* exception_pointers) {
+  INITIALIZATION_STATE_DCHECK_VALID(initialized_);
+  DCHECK(!exception_);
+
+  exception_.reset(new internal::ExceptionSnapshotWin());
+  if (!exception_->Initialize(&process_reader_, thread, exception_pointers)) {
+    exception_.reset();
+    return false;
+  }
+
+  return true;
+}
+
 void ProcessSnapshotWin::GetCrashpadOptions(
     CrashpadInfoClientOptions* options) {
   INITIALIZATION_STATE_DCHECK_VALID(initialized_);
@@ -149,8 +164,7 @@ std::vector<const ModuleSnapshot*> ProcessSnapshotWin::Modules() const {
 }
 
 const ExceptionSnapshot* ProcessSnapshotWin::Exception() const {
-  CHECK(false) << "TODO(scottmg): Exception()";
-  return nullptr;
+  return exception_.get();
 }
 
 void ProcessSnapshotWin::InitializeThreads() {