Fixing names of password_manager kEnableManualFallbacksFilling feature.

Fixing  names of password_manager kEnableManualFallbacksFilling feature
as per the naming convention.

Bug: 785953
Change-Id: I4a4baa1649fe9f02c3783a5e4c40bc75e717cc03
Reviewed-on: https://chromium-review.googlesource.com/900566
Reviewed-by: Vaclav Brozek <vabr@chromium.org>
Commit-Queue: NIKHIL SAHNI <nikhil.sahni@samsung.com>
Cr-Commit-Position: refs/heads/master@{#534923}
void ReportAboutFlagsHistogramSwitches(const std::string& uma_histogram_name,
                                       const std::set<std::string>& switches) {
  for (const std::string& flag : switches) {
    int uma_id = about_flags::testing::kBadSwitchFormatHistogramId;
    if (base::StartsWith(flag, "--", base::CompareCase::SENSITIVE)) {
      std::string switch_name(flag.substr(2));

      const size_t value_pos = switch_name.find('=');
      if (value_pos != std::string::npos)
        switch_name.resize(value_pos);

      uma_id = GetSwitchUMAId(switch_name);
    } else {
      NOTREACHED() << "ReportAboutFlagsHistogram(): flag '" << flag
                   << "' has incorrect format.";
    }
    DVLOG(1) << "ReportAboutFlagsHistogram(): histogram='" << uma_histogram_name
             << "' '" << flag << "', uma_id=" << uma_id;
    base::UmaHistogramSparse(uma_histogram_name, uma_id);
  }
}

void ReportAboutFlagsHistogramSwitches(const std::string& uma_histogram_name,
                                       const std::set<std::string>& switches) {
  for (const std::string& flag : switches) {
    int uma_id = about_flags::testing::kBadSwitchFormatHistogramId;
    if (base::StartsWith(flag, "--", base::CompareCase::SENSITIVE)) {
      std::string switch_name(flag.substr(2));

      const size_t value_pos = switch_name.find('=');
      if (value_pos != std::string::npos)
        switch_name.resize(value_pos);

      uma_id = GetSwitchUMAId(switch_name);
    } else {
      NOTREACHED() << "ReportAboutFlagsHistogram(): flag '" << flag
                   << "' has incorrect format.";
    }
    DVLOG(1) << "ReportAboutFlagsHistogram(): histogram='" << uma_histogram_name
             << "' '" << flag << "', uma_id=" << uma_id;
    base::UmaHistogramSparse(uma_histogram_name, uma_id);
  }
}
