Make Chromoting Host report crashes to Breakpad (Windows only). The user must enable crash dumps co…

remoting/host/breakpad_win.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "remoting/host/breakpad.h"
+
+#include <windows.h>
+
+#include "base/string16.h"
+#include "base/stringprintf.h"
+#include "base/win/registry.h"
+#include "remoting/host/constants.h"
+
+namespace {
+
+// The following strings are used to construct the registry key names where
+// the user's consent to collect crash dumps is recorded.
+const wchar_t kOmahaClientStateKeyFormat[] = L"Google\\Update\\%ls\\%ls";
+const wchar_t kOmahaClientState[] = L"ClientState";
+const wchar_t kOmahaClientStateMedium[] = L"ClientStateMedium";
+const wchar_t kOmahaUsagestatsValue[] = L"usagestats";
+
+}  // namespace
+
+namespace remoting {
+
+bool IsCrashReportingEnabled() {
+  // The user's consent to collect crash dumps is recored as the "usagestats"
+  // value in the ClientState or ClientStateMedium key. Probe
+  // the ClientStateMedium key first.
+  string16 client_state = StringPrintf(kOmahaClientStateKeyFormat,
+                                       kOmahaClientStateMedium,
+                                       remoting::kHostOmahaAppid);
+  base::win::RegKey key;
+  LONG result = key.Open(HKEY_LOCAL_MACHINE, client_state.c_str(), KEY_READ);
+  if (result == ERROR_SUCCESS) {
+    DWORD value = 0;
+    result = key.ReadValueDW(kOmahaUsagestatsValue, &value);
+    if (result == ERROR_SUCCESS) {
+      return value != 0;
+    }
+  }
+
+  client_state = StringPrintf(kOmahaClientStateKeyFormat,
+                              kOmahaClientState,
+                              remoting::kHostOmahaAppid);
+  result = key.Open(HKEY_LOCAL_MACHINE, client_state.c_str(), KEY_READ);
+  if (result == ERROR_SUCCESS) {
+    DWORD value = 0;
+    result = key.ReadValueDW(kOmahaUsagestatsValue, &value);
+    if (result == ERROR_SUCCESS) {
+      return value != 0;
+    }
+  }
+
+  // Do not collect anything unless the user has explicitly allowed it.
+  return false;
+}
+
+}  // namespace remoting