IndexedDB: Fix trivial cpplint.py errors

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
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=276451

[jsbell, 2014-06-06 18:55:03]

cmumford@, ericu@ - please take a look?

tsepez@ - OWNERS review of trivial messaging change (unsigned long -> uint32) ?

[Tom Sepez, 2014-06-06 19:05:16]

Messages LGTM.  Thanks for the cleanup.

[cmumford, 2014-06-09 19:17:21]

lgtm

https://codereview.chromium.org/311263014/diff/1/content/browser/indexed_db/i...
File content/browser/indexed_db/indexed_db_backing_store.cc (right):

https://codereview.chromium.org/311263014/diff/1/content/browser/indexed_db/i...
content/browser/indexed_db/indexed_db_backing_store.cc:165: // TODO(cmumford):
Improve test coverage so that all error conditions are
I'm on it :-)

[jsbell, 2014-06-09 19:21:34]

The CQ bit was checked by jsbell@chromium.org

[commit-bot: I haz the power, 2014-06-09 19:22:33]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jsbell@chromium.org/311263014/20001

[ericu, 2014-06-09 19:31:12]

lgtm

[commit-bot: I haz the power, 2014-06-10 08:26:47]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  ios_rel_device on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/ios_rel_device/builds...)
  linux_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_rel/bu...)

[commit-bot: I haz the power, 2014-06-10 12:32:03]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-06-10 12:32:04]

Try jobs failed on following builders:
  linux_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_rel/bu...)

[jsbell, 2014-06-11 16:59:16]

The CQ bit was checked by jsbell@chromium.org

[commit-bot: I haz the power, 2014-06-11 17:00:14]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jsbell@chromium.org/311263014/20001

[commit-bot: I haz the power, 2014-06-11 18:08:43]

Change committed as 276451