Fixed lints found by cpplint.
Filter: '-whitespace/tab,-whitespace/line_length,-whitespace/blank_line,-whitespace/braces,-readability/todo,-legal/copyright,-whitespace/comments,-readability/streams,-build/namespaces,-whitespace/operators,-whitespace/comma,-build/include,-readability/multiline_string,-readability/casting,-whitespace,-readability/namespace,-runtime/references'.