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
int64 GetListPrefInt64Value(
    const base::ListValue& list_update, size_t index) {
  std::string string_value;
  EXPECT_TRUE(list_update.GetString(index, &string_value));

  int64 value = 0;
  EXPECT_TRUE(base::StringToInt64(string_value, &value));
  return value;
}

int64 GetListPrefInt64Value(
    const base::ListValue& list_update, size_t index) {
  std::string string_value;
  EXPECT_TRUE(list_update.GetString(index, &string_value));

  int64 value = 0;
  EXPECT_TRUE(base::StringToInt64(string_value, &value));
  return value;
}
