Fix host auth scripts to work with Windows.

Fix simple_host to work when \Users\<username> is on a different drive than the chrome repository.

BUG=none
TEST=run scripts & host process on Windows

Review URL: http://codereview.chromium.org/2822029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@50802 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/remoting/host/simple_host_process.cc b/remoting/host/simple_host_process.cc
index 09f6a96..0f12c43 100644
--- a/remoting/host/simple_host_process.cc
+++ b/remoting/host/simple_host_process.cc
@@ -43,12 +43,13 @@
 
 #if defined(OS_WIN)
 const std::wstring kDefaultConfigPath = L".ChromotingConfig.json";
+const wchar_t kHomeDrive[] = L"HOMEDRIVE";
 const wchar_t kHomePath[] = L"HOMEPATH";
 const wchar_t* GetEnvironmentVar(const wchar_t* x) { return _wgetenv(x); }
 #else
-static char* GetEnvironmentVar(const char* x) { return getenv(x); }
-const char kHomePath[] = "HOME";
 const std::string kDefaultConfigPath = ".ChromotingConfig.json";
+const char kHomePath[] = "HOME";
+static char* GetEnvironmentVar(const char* x) { return getenv(x); }
 #endif
 
 const std::string kFakeSwitchName = "fake";
@@ -81,7 +82,13 @@
   // Check the argument to see if we should use a fake capturer and encoder.
   bool fake = cmd_line->HasSwitch(kFakeSwitchName);
 
-  FilePath config_path(GetEnvironmentVar(kHomePath));
+#if defined(OS_WIN)
+  std::wstring path = GetEnvironmentVar(kHomeDrive);
+  path += GetEnvironmentVar(kHomePath);
+#else
+  std::string path = GetEnvironmentVar(kHomePath);
+#endif
+  FilePath config_path(path);
   config_path = config_path.Append(kDefaultConfigPath);
   if (cmd_line->HasSwitch(kConfigSwitchName)) {
     config_path = cmd_line->GetSwitchValuePath(kConfigSwitchName);