cbui: fix PWA restore tests on Mac

These tests check that window positions and sizes are restored properly.
Unfortunately they put their test windows at (10,10) which the window
server helpfully adjusts to (10,23) to keep them from overlapping the
title bar, which confuses the tests. Have them put their windows at
(50,50) instead to avoid that.

Bug: 1028239
Change-Id: Id69fc6d841878b35c74f0ebe51e8edc127057d92
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1937770
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Auto-Submit: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719345}

chrome/browser/ui/extensions/hosted_app_browsertest.cc

@@ -973,7 +973,7 @@ IN_PROC_BROWSER_TEST_P(HostedAppPWAOnlyTest, PWASizeIsCorrectlyRestored) {
   EXPECT_TRUE(web_app::AppBrowserController::IsForWebAppBrowser(app_browser_));
   NavigateToURLAndWait(app_browser_, GetSecureAppURL());
 
-  gfx::Rect bounds = gfx::Rect(10, 10, 500, 500);
+  gfx::Rect bounds = gfx::Rect(50, 50, 500, 500);
   app_browser_->window()->SetBounds(bounds);
   app_browser_->window()->Close();
 
@@ -991,7 +991,7 @@ IN_PROC_BROWSER_TEST_P(HostedAppPWAOnlyTest,
   EXPECT_TRUE(web_app::AppBrowserController::IsForWebAppBrowser(app_browser_));
   NavigateToURLAndWait(app_browser_, GetSecureAppURL());
 
-  gfx::Rect bounds = gfx::Rect(10, 10, 500, 500);
+  gfx::Rect bounds = gfx::Rect(50, 50, 500, 500);
   app_browser_->window()->SetBounds(bounds);
   app_browser_->window()->Close();