Mac: Fix SSLClientCertificateSelectorCocoaTest.HideShow (fails on macOS Sierra).

chrome/browser/ui/cocoa/ssl_client_certificate_selector_cocoa.mm

Index: chrome/browser/ui/cocoa/ssl_client_certificate_selector_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/ssl_client_certificate_selector_cocoa.mm b/chrome/browser/ui/cocoa/ssl_client_certificate_selector_cocoa.mm
index 2400ec2a628b0d097d0a923b49c98a5364e20d26..aa06b2d989ff696541645153fad4f79cd81ca48b 100644
--- a/chrome/browser/ui/cocoa/ssl_client_certificate_selector_cocoa.mm
+++ b/chrome/browser/ui/cocoa/ssl_client_certificate_selector_cocoa.mm
@@ -282,25 +282,17 @@ void ClearTableViewDataSourcesIfNeeded(NSWindow*) {}
 - (void)hideSheet {
   NSWindow* sheetWindow = [overlayWindow_ attachedSheet];
   [sheetWindow setAlphaValue:0.0];
+  [sheetWindow setIgnoresMouseEvents:YES];
 
   oldResizesSubviews_ = [[sheetWindow contentView] autoresizesSubviews];
   [[sheetWindow contentView] setAutoresizesSubviews:NO];
-
-  oldSheetFrame_ = [sheetWindow frame];
-  NSRect overlayFrame = [overlayWindow_ frame];
-  oldSheetFrame_.origin.x -= NSMinX(overlayFrame);
-  oldSheetFrame_.origin.y -= NSMinY(overlayFrame);
-  [sheetWindow setFrame:ui::kWindowSizeDeterminedLater display:NO];
 }
 
 - (void)unhideSheet {
   NSWindow* sheetWindow = [overlayWindow_ attachedSheet];
-  NSRect overlayFrame = [overlayWindow_ frame];
-  oldSheetFrame_.origin.x += NSMinX(overlayFrame);
-  oldSheetFrame_.origin.y += NSMinY(overlayFrame);
-  [sheetWindow setFrame:oldSheetFrame_ display:NO];
   [[sheetWindow contentView] setAutoresizesSubviews:oldResizesSubviews_];
-  [[overlayWindow_ attachedSheet] setAlphaValue:1.0];
+  [sheetWindow setAlphaValue:1.0];
+  [sheetWindow setIgnoresMouseEvents:NO];
 }
 
 - (void)pulseSheet {