message: Remove dangling 'using std::string'
diff: #include "os/os_specific.h"
  #include "strings/string_utils.h"
  -using std::string;
  -
  namespace Keyboard
  {
  void Init()
  @@ -66,12 +64,12 @@ bool GetKeyState(int key)
  namespace FileIO
  {
  -string GetTempRootPath()
  +std::string GetTempRootPath()
  {
  return "/tmp";
  }
  -string GetAppFolderFilename(const string &filename)
  +std::string GetAppFolderFilename(const std::string &filename)
  {
  const char *homedir = NULL;
  if(getenv("HOME") != NULL)
  @@ -85,29 +83,29 @@ string GetAppFolderFilename(const string &filename)
  homedir = getpwuid(getuid())->pw_dir;
  }
  - string ret = string(homedir) + "/.renderdoc/";
  + std::string ret = std::string(homedir) + "/.renderdoc/";
  mkdir(ret.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
  return ret + filename;
  }
  -void GetExecutableFilename(string &selfName)
  +void GetExecutableFilename(std::string &selfName)
  {
  char path[512] = {0};
  readlink("/proc/self/exe", path, 511);
  - selfName = string(path);
  + selfName = std::string(path);
  }
  int LibraryLocator = 42;
  -void GetLibraryFilename(string &selfName)
  +void GetLibraryFilename(std::string &selfName)
  {
  // this is a hack, but the only reliable way to find the absolute path to the library.
  // dladdr would be fine but it returns the wrong result for symbols in the library
  - string librenderdoc_path;
  + std::string librenderdoc_path;
  FILE *f = fopen("/proc/self/maps", "r");
  @@ -182,7 +180,7 @@ void GetLibraryFilename(string &selfName)
  char *end = strchr(c, '\n');
  if(end)
  - librenderdoc_path = string(c, end - c);
  + librenderdoc_path = std::string(c, end - c);
  }
  delete[] map_string;
  