Add ObjectProxy::CallMethodAndBlockWithErrorDetails methods

Add ObjectProxy::CallMethodAndBlockWithErrorDetails methods

Currently, ObjectProxy::CallMethodAndBlock() returns NULL on
failure but the D-Bus error details are not passed to the caller.

Added a method that would return the D-Bus error information
to the caller and switched ObjectProxy::CallMethodAndBlock()
to use the new method instead.

BUG=chromium:414838
TEST=Build Chrome
TEST=ninja -C out/Debug dbus_unittests && out/Debug/dbus_unittests

Committed: https://crrev.com/6b571de0807eea51c863cf0aa18403ae6c18ba65
Cr-Commit-Position: refs/heads/master@{#295212}

[Alex Vakulenko (Google), 2014-09-16 22:21:15]

avakulenko@google.com changed reviewers:
+ keybuk@chromium.org

[Alex Vakulenko (Google), 2014-09-16 22:21:23]

avakulenko@google.com changed reviewers:
+ avakulenko@google.com

[keybuk, 2014-09-16 22:35:01]

lgtm after nit fix

https://codereview.chromium.org/563763004/diff/1/dbus/object_proxy.h
File dbus/object_proxy.h (right):

https://codereview.chromium.org/563763004/diff/1/dbus/object_proxy.h#newcode29
dbus/object_proxy.h:29: class ScopedDBusError;
nit: alphabetical order here

[Alex Vakulenko (Google), 2014-09-16 22:42:44]

https://codereview.chromium.org/563763004/diff/1/dbus/object_proxy.h
File dbus/object_proxy.h (right):

https://codereview.chromium.org/563763004/diff/1/dbus/object_proxy.h#newcode29
dbus/object_proxy.h:29: class ScopedDBusError;
On 2014/09/16 22:35:01, keybuk wrote:
> nit: alphabetical order here

And I thought I put it in alphabetical order :) I need to refresh my ABCs
apparently...

[Alex Vakulenko (Google), 2014-09-16 22:44:30]

The CQ bit was checked by avakulenko@google.com

[commit-bot: I haz the power, 2014-09-16 22:45:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/563763004/20001

[commit-bot: I haz the power, 2014-09-17 01:44:17]

Committed patchset #2 (id:20001) as 9386eebfc1021eadd8121d24a64e66489f1026dc

[commit-bot: I haz the power, 2014-09-17 01:45:34]

Patchset 2 (id:??) landed as
https://crrev.com/6b571de0807eea51c863cf0aa18403ae6c18ba65
Cr-Commit-Position: refs/heads/master@{#295212}