Use the frame-specific service registry for PaymentRequest

This patch changes PaymentRequest to use the Mojo service registry from
LocalFrame.h. This service registry is distinct from Platform.h, which
is for the render thread. Thread's and frame's service registries
communicate to different sets of Mojo services in the browser.

BUG=587995

Review URL: https://codereview.chromium.org/1866083002

Cr-Commit-Position: refs/heads/master@{#385599}
1 file changed