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Previously PlatformWindowInitProperties was passed to Ozone platform
implementations as a const reference. This doesn't allow to pass movable
parameters (e.g. handles) when creating platform windows. On Fuchsia it
is necessary to pass view_owner_request when creating a view.
view_owner_request wraps an handle, so it's not copyable. Updated all
code that works with PlatformWindowInitProperties to pass it by value.

Also updated DesktopWindowTreeHostPlatform to default to POPUP window
type for any widget types other then WINDOW and MENU.

Bug: 829980
Change-Id: I34c7a8fe957f364833a5e4eafd272794eec99b56
Reviewed-on: https://chromium-review.googlesource.com/1103223Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568153}