IndexedDB: Fix trivial cpplint.py errors
Classes of errors tackled: whitespace, include-what-you-use, explicit
constructors, parameter names, include guards, bracing, and one
use of "unsigned long" in IPC.
This does not tackle use of non-const references, since those should
be carefully reviewed and affects the callers. Also, several uses
of "long" remain in content/child when implementing Blink interfaces.
R=cmumford@chromium.org,ericu@chromium.org,tsepez@chromium.org
BUG=381456
Review URL: https://codereview.chromium.org/
311263014
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276451 0039d316-1c4b-4281-b951-d872f2087c98