P0 please

Issue 756860 has been merged into this issue.

assign to weidongg, since he has done a bunch of keyboard focus work. Beside the reporter's issue, we shall also eliminate the highlight/focus on search results when typing (which is an old behavior but not seen on new specs).

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/836f045fe55a12bfe5eacf8bd1c6e41a3b9decd2

commit 836f045fe55a12bfe5eacf8bd1c6e41a3b9decd2
Author: Weidong Guo <weidongg@chromium.org>
Date: Wed Aug 30 17:34:24 2017

Fix keyboard focus of SearchResultPageView

Changes:
1. Initial focus is on the first search result when opened search box is
shown, tab key moves the focus to the second search result.
2. When search box text field is selected and query is not empty, select
the entire text.
3. When search box text field is selected, left and right key could
only move the cursor, only tab key could navigate the focus off.
4. In AppsGridView, up and left key could move focus back to search box.
5. In SearchResultPageView, up and left key could move focus back to
search box.
6. Make left and right key's behavior the same as tab and shift+tab in
SearchResultPageView.
7. Add test coverage for arrow/tab key focus movement.

BUG= 758737 
TEST=SearchResultPageViewFullscreenTest.*

Change-Id: I9bd791a92bf736ef4de9ae80b311d1e6ad2dc3db
Reviewed-on: https://chromium-review.googlesource.com/639852
Commit-Queue: Weidong Guo <weidongg@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#498525}
[modify] https://crrev.com/836f045fe55a12bfe5eacf8bd1c6e41a3b9decd2/ui/app_list/views/apps_grid_view.cc
[modify] https://crrev.com/836f045fe55a12bfe5eacf8bd1c6e41a3b9decd2/ui/app_list/views/apps_grid_view_unittest.cc
[modify] https://crrev.com/836f045fe55a12bfe5eacf8bd1c6e41a3b9decd2/ui/app_list/views/search_box_view.cc
[modify] https://crrev.com/836f045fe55a12bfe5eacf8bd1c6e41a3b9decd2/ui/app_list/views/search_box_view_unittest.cc
[modify] https://crrev.com/836f045fe55a12bfe5eacf8bd1c6e41a3b9decd2/ui/app_list/views/search_result_list_view.cc
[modify] https://crrev.com/836f045fe55a12bfe5eacf8bd1c6e41a3b9decd2/ui/app_list/views/search_result_list_view.h
[modify] https://crrev.com/836f045fe55a12bfe5eacf8bd1c6e41a3b9decd2/ui/app_list/views/search_result_page_view.cc
[modify] https://crrev.com/836f045fe55a12bfe5eacf8bd1c6e41a3b9decd2/ui/app_list/views/search_result_page_view_unittest.cc
[modify] https://crrev.com/836f045fe55a12bfe5eacf8bd1c6e41a3b9decd2/ui/app_list/views/search_result_tile_item_list_view.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1ff79a79eb35d17dc762cb0f318613dd12a1ed9a

commit 1ff79a79eb35d17dc762cb0f318613dd12a1ed9a
Author: Vadim Tryshev <vadimt@google.com>
Date: Thu Aug 31 23:26:09 2017

Fix keyboard focus of SearchResultPageView

Changes:
1. Initial focus is on the first search result when opened search box is
shown, tab key moves the focus to the second search result.
2. When search box text field is selected and query is not empty, select
the entire text.
3. When search box text field is selected, left and right key could
only move the cursor, only tab key could navigate the focus off.
4. In AppsGridView, up and left key could move focus back to search box.
5. In SearchResultPageView, up and left key could move focus back to
search box.
6. Make left and right key's behavior the same as tab and shift+tab in
SearchResultPageView.
7. Add test coverage for arrow/tab key focus movement.

BUG= 758737 
TEST=SearchResultPageViewFullscreenTest.*
TBR=weidongg@chromium.org

(cherry picked from commit 836f045fe55a12bfe5eacf8bd1c6e41a3b9decd2)

Change-Id: I9bd791a92bf736ef4de9ae80b311d1e6ad2dc3db
Reviewed-on: https://chromium-review.googlesource.com/639852
Commit-Queue: Weidong Guo <weidongg@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#498525}
Reviewed-on: https://chromium-review.googlesource.com/646799
Reviewed-by: Vadim Tryshev <vadimt@chromium.org>
Cr-Commit-Position: refs/branch-heads/3163@{#1060}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
[modify] https://crrev.com/1ff79a79eb35d17dc762cb0f318613dd12a1ed9a/ui/app_list/views/apps_grid_view.cc
[modify] https://crrev.com/1ff79a79eb35d17dc762cb0f318613dd12a1ed9a/ui/app_list/views/apps_grid_view_unittest.cc
[modify] https://crrev.com/1ff79a79eb35d17dc762cb0f318613dd12a1ed9a/ui/app_list/views/search_box_view.cc
[modify] https://crrev.com/1ff79a79eb35d17dc762cb0f318613dd12a1ed9a/ui/app_list/views/search_box_view_unittest.cc
[modify] https://crrev.com/1ff79a79eb35d17dc762cb0f318613dd12a1ed9a/ui/app_list/views/search_result_list_view.cc
[modify] https://crrev.com/1ff79a79eb35d17dc762cb0f318613dd12a1ed9a/ui/app_list/views/search_result_list_view.h
[modify] https://crrev.com/1ff79a79eb35d17dc762cb0f318613dd12a1ed9a/ui/app_list/views/search_result_page_view.cc
[modify] https://crrev.com/1ff79a79eb35d17dc762cb0f318613dd12a1ed9a/ui/app_list/views/search_result_page_view_unittest.cc
[modify] https://crrev.com/1ff79a79eb35d17dc762cb0f318613dd12a1ed9a/ui/app_list/views/search_result_tile_item_list_view.cc