Prepare hanging_program for string16 switch

Bug: chromium:911896
Change-Id: I2911b44a7b96f1fe7a300c0f7f54b1aaff0ee5f1
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/2719888
Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Mark Mentovai <mark@chromium.org>
GitOrigin-RevId: 8cdc852a9ef0a7db46878326117fc3c09b11ceea
diff --git a/handler/win/hanging_program.cc b/handler/win/hanging_program.cc
index 3fec43b..04c093a 100644
--- a/handler/win/hanging_program.cc
+++ b/handler/win/hanging_program.cc
@@ -53,7 +53,7 @@
   HANDLE event = context;
   PCHECK(SetEnvironmentVariable(
       L"CRASHPAD_TEST_DLL_EVENT",
-      base::UTF8ToUTF16(base::StringPrintf("%p", event)).c_str()));
+      base::UTF8ToWide(base::StringPrintf("%p", event)).c_str()));
 
   HMODULE dll = LoadLibrary(L"loader_lock_dll.dll");
   if (!dll)