[Runtime] Add user href attribute check in widget element handler.

When parsing a widget config.xml file, runtime should make sure the author href
attribute is a valid URI, as it's required in W3C Widget spec. This patch will
fix this.

BUG=XWALK-2995
[Tizen] Add recognition of empty parameters in options of xwalk_backend

Empty path in -i option and incorrect pkgid in -r option were not
recognized. These parameters were unnecessary passed further to other
functions.

BUG=XWALK-3051
Merge pull request #2672 from doduda/XWALK-3051

[Tizen] Add recognition of empty parameters in options of xwalk_backend
Fix Windows build.

Rename CreateWindow to avoid conflicting with some other symbols.
Merge pull request #2680 from darktears/master

Fix Windows build.
DEPS.xwalk: Roll v8-crosswalk (825a59c -> 05d1cf4)

05d1cf4 Merge pull request #68 from t25kim/develop
f05733c Fix syntax error to solve build failure
748da85 Merge pull request #67 from rakuco/fix-line-endings
b6cb3b2 XDK: Convert line endings from DOS to Unix.
Bump version to 11.39.259.0
[Tizen]Move global constant values into proper namespace.

The widget configuration keys and preset values should be included inside the namespace "application_widget_keys".
Merge pull request #2684 from yejingfu/fix-widget

[Tizen]Move global constant values into proper namespace.
[TIZEN] Runtime has no chance to get remote debug flag

The first created Runtime has no chance to notify its application
(observer) to update its remote debug flag.

BUG=https://crosswalk-project.org/jira/browse/XWALK-3080
Merge pull request #2688 from wuyuehang/XWALK-3080

[TIZEN] Runtime has no chance to get remote debug flag
Bump version to 11.39.260.0
Merge pull request #2691 from huningxin/roll_v8

DEPS.xwalk: Roll v8-crosswalk (825a59c -> 05d1cf4)
[Tizen]Fix typos.
Correct some typos.

BUG=XWALK-3084
Merge pull request #2692 from rookiejava/trunk

[Tizen]Fix typos.
Unexpected crash when run/debug xwalkdriver unit tests

Add code to check the conditions of empty App icon. Since the runtime::app_icon() will
return an empty icon for Android non-host-application.

BUG=https://crosswalk-project.org/jira/browse/XWALK-2914
Merge pull request #2636 from iKevinHan/devtools_cause_crash_android

[Android] Fix devtools favicon will cause crash.
Merge pull request #2639 from takethathe/XWALK-2995

[Runtime] Add author href attribute check in widget element handler.
Bump version to 11.39.261.0
Add support for file-picker using WebUI

Bug=XWALK-950