From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Cheng Zhao <zcbenz@gmail.com>
Date: Thu, 4 Oct 2018 14:57:02 -0700
Subject: feat: enable setting aspect ratio to 0

Make SetAspectRatio accept 0 as valid input, which would reset to null.

diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc b/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
index 6cd2eace306cb6b3b8d39d968f898c6468d00eea..e2146f0a06fb70d16c48fe6e06d0615caf7d4619 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
@@ -583,7 +583,7 @@ void DesktopWindowTreeHostWin::SetOpacity(float opacity) {
 void DesktopWindowTreeHostWin::SetAspectRatio(
     const gfx::SizeF& aspect_ratio,
     const gfx::Size& excluded_margin) {
-  DCHECK(!aspect_ratio.IsEmpty());
+  DCHECK_NE(aspect_ratio.height(), 0);
   message_handler_->SetAspectRatio(aspect_ratio.width() / aspect_ratio.height(),
                                    excluded_margin);
 }
diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
index 8e0e565f4a8a1e39070a9225bcfc277e3eb0ba60..fc0c3a59dc308d675cc3997231df2c9b9ad02e83 100644
--- a/ui/views/win/hwnd_message_handler.cc
+++ b/ui/views/win/hwnd_message_handler.cc
@@ -967,8 +967,11 @@ void HWNDMessageHandler::SetFullscreen(bool fullscreen,
 
 void HWNDMessageHandler::SetAspectRatio(float aspect_ratio,
                                         const gfx::Size& excluded_margin) {
-  // If the aspect ratio is not in the valid range, do nothing.
-  DCHECK_GT(aspect_ratio, 0.0f);
+  // If the aspect ratio is 0, reset it to null.
+  if (aspect_ratio == 0.0f) {
+    aspect_ratio_.reset();
+    return;
+  }
 
   aspect_ratio_ = aspect_ratio;