Fix the hasBackingFile flag for File backed by a file system URL.

Fix the hasBackingFile flag for File backed by a file system URL.

We assume File instance has a file path if hasBackiingFile() is true.
But previously the constructor for file system URL specifies true to the flag.
This CL turns the flag to false at the constructor.

BUG=NONE

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=183871

[hirono, 2014-10-17 07:19:39]

hirono@chromium.org changed reviewers:
+ tkent@chromium.org

[hirono, 2014-10-17 07:19:40]

During handling comments of crrev.com/640723006, I found a wrong value of the
hasBackingFile flag in File class's constructor.
PTAL the CL? Thank you!

[tkent, 2014-10-17 07:24:33]

tkent@chromium.org changed reviewers:
+ costan@gmail.com

[tkent, 2014-10-17 07:24:34]

+costan

Can you add a test?

[hirono, 2014-10-17 07:59:49]

Added. Thanks!

[tkent, 2014-10-17 08:01:41]

lgtm

[pwnall-personal, 2014-10-17 09:14:21]

On 2014/10/17 07:24:34, tkent wrote:
> +costan

Thank you for including me on this, Kent-san!

Sorry for the copy-paste error :( The fix looks right to me.

[hirono, 2014-10-17 09:15:52]

On 2014/10/17 09:14:21, pwnall wrote:
> On 2014/10/17 07:24:34, tkent wrote:
> > +costan
> 
> Thank you for including me on this, Kent-san!
> 
> Sorry for the copy-paste error :( The fix looks right to me.

Thanks!

[hirono, 2014-10-17 09:15:57]

The CQ bit was checked by hirono@chromium.org

[commit-bot: I haz the power, 2014-10-17 09:17:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/660763004/20001

[commit-bot: I haz the power, 2014-10-17 09:56:35]

Committed patchset #2 (id:20001) as 183871