MacViews: Fix WidgetTest.WidgetDeleted_InOnMousePressed

ui/views/cocoa/bridged_native_widget.mm

Index: ui/views/cocoa/bridged_native_widget.mm
diff --git a/ui/views/cocoa/bridged_native_widget.mm b/ui/views/cocoa/bridged_native_widget.mm
index 4c7a28cdd1f8a9d35456e7f9b08eec96109253b9..71e7290cb2d8a89cb1d6a1daf0c356c41a4e35e8 100644
--- a/ui/views/cocoa/bridged_native_widget.mm
+++ b/ui/views/cocoa/bridged_native_widget.mm
@@ -134,6 +134,15 @@ void BridgedNativeWidget::Init(base::scoped_nsobject<NSWindow> window,
     // would appear there, which might be unexpected.
     DCHECK(params.bounds.origin().IsOrigin())
         << "Zero-sized windows not supported on Mac.";
+
+    // Otherwise, bounds is all zeroes. Cocoa will currently have the window at
+    // the bottom left of the screen. To support a client calling SetSize() only
+    // (and for consistency across platforms) put it at the top-left instead.
+    // Read back the current frame: it will be a 1x1 context rect but the frame
+    // size also depends on the window style.
+    NSRect frame_rect = [window_ frame];
+    SetBounds(gfx::Rect(gfx::Point(),
+                        gfx::Size(NSWidth(frame_rect), NSHeight(frame_rect))));
   }
 
   // Widgets for UI controls (usually layered above web contents) start visible.