If we consider the plugin scenario is unlikely and decide it's
unsupported for widgets, we can simplify our tests and examples
a bit on this front.

Change-Id: Idc96032c127b4ee74fb5c7b3d2cdfdf99c3a722e
Reviewed-by: Andras Becsi <andras.becsi@digia.com>

This means that widgets application now need to setup the GL context
sharing as well. QWebEngineWidgets::initialize() must be called,
which has the same effect as QWebEngine::initialize().
The QtWebEngineWidgets now depends on the QtWebEngine module to make
this happen.

Since QOpenGLWidget is only available in Qt 5.3, this patch also
disables the webenginewidgets module completely when building using
Qt 5.2.

Change-Id: I0e99a779d1eb080f2ccf5a338ff0763ad64e6eba
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>

To match other modules example directory structures we should deploy our
examples in a directory matching the module name, webengine and
webenginewidgets in our case.

qmake uses the relative directory of each example up to the upper "examples"
directory to decide where they will be deployed when running the sources
install target.

Change-Id: I59ce7ff8a30f98fad20064c7eecf72b784f1d275
Reviewed-by: Pierre Rossi <pierre.rossi@gmail.com>

Change-Id: Ia61fbe3ef6b76c7530d10d4a3305d4208b3469ef
Reviewed-by: Zeno Albisser <zeno.albisser@digia.com>