Reviewed by Jeremy Orlow.

        Hook up LayoutTestController.setMockDeviceOrientation() in Chromium DumpRenderTree.
        https://bugs.webkit.org/show_bug.cgi?id=45460

        This enables DumpRenderTree to run layout tests for DeviceOrientation.

        Also declare the LayoutTestController destructor out-of-line.
        Otherwise the implicit destructor would cause compiler errors because
        of the OwnPtr<WebKit::WebDeviceOrientationClientMock> member.

        * DumpRenderTree/chromium/LayoutTestController.cpp:
        (LayoutTestController::~LayoutTestController):
        (LayoutTestController::setMockDeviceOrientation):
        (LayoutTestController::deviceOrientationClient):
        * DumpRenderTree/chromium/LayoutTestController.h:
        * DumpRenderTree/chromium/WebViewHost.cpp:
        (WebViewHost::deviceOrientationClient):
        * DumpRenderTree/chromium/WebViewHost.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@67177 268f45cc-cd09-0410-ab3c-d52691b4dbfc