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This is a reland of 8144dae3

Original change's description:
> Quick Answers: Add page size options for Search request
>
> Since we only use the first result from search request, set the page
> size to 1 to reduce the delay.
>
> Bug: b/173239982
> Test: None
> Change-Id: Ib2abd92e23b430b837f0556c31bcc0d17873256e
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2574072
> Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
> Reviewed-by: Jeroen Dhollander <jeroendh@chromium.org>
> Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
> Commit-Queue: Yue Li <updowndota@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#833940}

Bug: b/173239982
Change-Id: I357edef540563fdbc8b5ba93bbb78ac127d827b4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2578262Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Jeroen Dhollander <jeroendh@chromium.org>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Commit-Queue: Yue Li <updowndota@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835849}