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>

Import the sources as-is, without adding it to the build, to allow
performing diffs later on the changes that were needed to port it
to use QtWebEngine and manage source compatibility issues.

Change-Id: Icf8a284881ce2153e9b5a1ba97dbe77096f1b88d
Reviewed-by: Andras Becsi <andras.becsi@digia.com>

Change-Id: I58d83f4f33728f92e4bf13b6be30b15528fdd033
Reviewed-by: Zeno Albisser <zeno.albisser@digia.com>

This is the first step to making proper Qt Modules out of QtWebEngine.
The Widgets integration becomes a proper C++ Qt Module while we make
the QtQuick side a QML plugin for now (could probably be promoted if
the need arises).

Code-wise, this means the introduction of a WebContentsAdapterClient
interface that is subclassed by the private implementation of our API
classes for delegation of things that are UI specific. Functionality
from WebContents and the like is exposed via the WebContentsAdapter.

Change-Id: I4ca3395b9fe8502a24e36002cfd5af44067bb6e8
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

Also remove some unneeded includes.

Change-Id: I335bfb1d8c74b2e44d7bf576c3b76f6c32af35c3
Reviewed-by: Zeno Albisser <zeno.albisser@digia.com>

Move common data from WebContentsView private classes to the
common base class WebContentsViewQtClient.

Change-Id: I77484691a24d14403c8a6e434d6fb33ac557637e
Reviewed-by: Zeno Albisser <zeno.albisser@digia.com>

Fix the gyp generator to allow including the moc file directly
in qwebcontentsview.cpp to be able to use Q_PRIVATE_SLOT
instead of having the private object deriving from QObject.

This also removes the use of MOCABLE_SOURCES whose entries were
added to 'sources' without moc being run on them first.

- Rename NativeViewQt to RenderWidgetHostViewQtDelegate to keep the
  context obvious.
- Use an interface to handle the parenting instead of the
  NativeViewContainerQt mechanism that was needed with the Shell.

This layers things properly to be able to implement the UI in the
example application instead of directly in shell_qt.cpp.

This is still using global variables to allow the Shell platform
code to do callbacks to the API classes. This should go away once
we properly implemented a WebContentsDelegate.