Prefer no spaces inside parentheses. The if and else keywords belong on separate lines.

team_c++_style_guide_conditionals.h

if (condition) {  // no spaces inside parentheses
    ...  // 4 space indent.
} else if (...) {  // The else goes on the same line as the closing brace.
    ...
} else {
    ...
}

// Sort conditional statements may be written on one line if this enhances readability.
if (x == kFoo) return new Foo();

// curly braces are required for single-line statements
if (condition) {
    DoSomething();  // 4 space indent.
}