Use of base::StringPairs appropriately in base

Using  base::StringPairs in base folder
Becuase base/strings/string_split.h defines:
typedef std::vector<std::pair<std::string, std::string> > StringPairs;

BUG=412250

Review URL: https://codereview.chromium.org/605613003

Cr-Commit-Position: refs/heads/master@{#296647}


CrOS-Libchrome-Original-Commit: f42513a7b8925d77c487033821b12fcce04ef554
1 file changed
tree: 3947c31d9a6a1f4850ed94ffc4a7064c43f8213a
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/