Update view manager to support content handling.

Update view manager to support content handling.

Change demo launcher to use this instead of Navigator interface. Update
existing apps and remove Navigator interface.

BUG=

[darin (slow to review), 2014-08-20 05:16:49]

https://codereview.chromium.org/489493004/diff/20001/mojo/examples/png_viewer...
File mojo/examples/png_viewer/png_viewer.cc (right):

https://codereview.chromium.org/489493004/diff/20001/mojo/examples/png_viewer...
mojo/examples/png_viewer/png_viewer.cc:226: ServiceProviderPtr service_provider)
OVERRIDE {
We probably want to change ContentHandler to take an
InterfaceRequest<ServiceProvider> instead (i.e., "ServiceProvider&" in the mojom
file). That way you can use BindToRequest to bind the lifetime of the PNGView to
the pipe. It also means that both sides have to implement
InterfaceImpl<ServiceProvider>, which makes things more symmetric. This is how
Embed / OnEmbed work. It is quite nice. See also
mojo/public/cpp/application/service_provider_impl.h. Ben added that to make it
easier to implement ServiceProvider.

[Aaron Boodman, 2014-08-20 06:21:03]

https://codereview.chromium.org/489493004/diff/20001/mojo/examples/png_viewer...
File mojo/examples/png_viewer/png_viewer.cc (right):

https://codereview.chromium.org/489493004/diff/20001/mojo/examples/png_viewer...
mojo/examples/png_viewer/png_viewer.cc:226: ServiceProviderPtr service_provider)
OVERRIDE {
On 2014/08/20 05:16:49, darin wrote:
> We probably want to change ContentHandler to take an
> InterfaceRequest<ServiceProvider> instead (i.e., "ServiceProvider&" in the
mojom
> file). That way you can use BindToRequest to bind the lifetime of the PNGView
to
> the pipe. It also means that both sides have to implement
> InterfaceImpl<ServiceProvider>, which makes things more symmetric. This is how
> Embed / OnEmbed work. It is quite nice. See also
> mojo/public/cpp/application/service_provider_impl.h. Ben added that to make it
> easier to implement ServiceProvider.

Does the BindToPipe() call I'm using in PNGView not do the same thing wrt
lifetimes?