Added daily UMA for non-data-reduction-proxy data usage when the proxy is enabled.

BUG=325325

Review URL: https://codereview.chromium.org/106113002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239897 0039d316-1c4b-4281-b951-d872f2087c98
bool HasSameParameterKey(const std::string& first_parameter,
                         const std::string& second_parameter) {
  DCHECK(second_parameter.find("=") != std::string::npos);
  std::string parameter_prefix = second_parameter.substr(
      0, second_parameter.find("=") + 1);
  return StartsWithASCII(first_parameter, parameter_prefix, false);
}

bool HasSameParameterKey(const std::string& first_parameter,
                         const std::string& second_parameter) {
  DCHECK(second_parameter.find("=") != std::string::npos);
  std::string parameter_prefix = second_parameter.substr(
      0, second_parameter.find("=") + 1);
  return StartsWithASCII(first_parameter, parameter_prefix, false);
}
