win: Print crash service's log to file.

common/crash_reporter/win/crash_service_main.cc

@@ -6,6 +6,7 @@
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
+#include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "base/logging.h"
@@ -13,19 +14,48 @@
 
 namespace crash_service {
 
+namespace {
+
+const wchar_t kStandardLogFile[] = L"operation_log.txt";
+
+bool GetCrashServiceDirectory(base::FilePath* dir) {
+  base::FilePath temp_dir;
+  if (!file_util::GetTempDir(&temp_dir))
+    return false;
+  temp_dir = temp_dir.Append(L"atom_crashes");
+  if (!file_util::PathExists(temp_dir)) {
+    if (!file_util::CreateDirectory(temp_dir))
+      return false;
+  }
+  *dir = temp_dir;
+  return true;
+}
+
+}  // namespace.
+
 int Main(const wchar_t* cmd_line) {
   // Initialize all Chromium things.
   base::AtExitManager exit_manager;
   CommandLine::Init(0, NULL);
 
+  // We use/create a directory under the user's temp folder, for logging.
+  base::FilePath operating_dir;
+  GetCrashServiceDirectory(&operating_dir);
+  base::FilePath log_file = operating_dir.Append(kStandardLogFile);
+
+  // Logging out to a file.
+  logging::InitLogging(
+      log_file.value().c_str(),
+      logging::LOG_TO_BOTH_FILE_AND_SYSTEM_DEBUG_LOG ,
+      logging::LOCK_LOG_FILE,
+      logging::DELETE_OLD_LOG_FILE,
+      logging::DISABLE_DCHECK_FOR_NON_OFFICIAL_RELEASE_BUILDS);
+  logging::SetLogItems(true, false, true, false);
+
   VLOG(1) << "Session start. cmdline is [" << cmd_line << "]";
 
-  wchar_t temp_dir[MAX_PATH] = { 0 };
-  ::GetTempPathW(MAX_PATH, temp_dir);
-  base::FilePath temp_path(temp_dir);
-
   breakpad::CrashService crash_service;
-  if (!crash_service.Initialize(temp_path, temp_path))
+  if (!crash_service.Initialize(operating_dir, operating_dir))
     return 1;
 
   VLOG(1) << "Ready to process crash requests";