[EFL] Set a theme for EFL WebKit2 unit test fixture

[EFL] Set a theme for EFL WebKit2 unit test fixture
https://bugs.webkit.org/show_bug.cgi?id=91618

Patch by Thiago Marcos P. Santos <thiago.santos@intel.com> on 2012-07-18
Reviewed by Kenneth Rohde Christiansen.

The test fixture should load the theme generated by the build
instead of trying to load the system theme.

* PlatformEfl.cmake:
* UIProcess/API/efl/tests/UnitTestUtils/EWK2UnitTestBase.cpp:
(EWK2UnitTest::EWK2UnitTestBase::SetUp):
* UIProcess/API/efl/tests/UnitTestUtils/EWK2UnitTestEnvironment.cpp:
(EWK2UnitTest::EWK2UnitTestEnvironment::defaultTheme):
(EWK2UnitTest):
* UIProcess/API/efl/tests/UnitTestUtils/EWK2UnitTestEnvironment.h:
(EWK2UnitTestEnvironment):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@123000 268f45cc-cd09-0410-ab3c-d52691b4dbfc