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 0be1688818063dac2242428393babcca1d03e836..e534b895eca4e28e003ef35de4a2fb5b32baf88b 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
@@ -564,7 +564,7 @@ void DesktopWindowTreeHostWin::SetOpacity(float opacity) {
 }
 
 void DesktopWindowTreeHostWin::SetAspectRatio(const gfx::SizeF& aspect_ratio) {
-  DCHECK(!aspect_ratio.IsEmpty());
+  DCHECK_NE(aspect_ratio.height(), 0);
   message_handler_->SetAspectRatio(aspect_ratio.width() /
                                    aspect_ratio.height());
 }
diff --git a/ui/views/win/hwnd_message_handler.cc b/ui/views/win/hwnd_message_handler.cc
index 22bb24f2afcefc3d875fe6959a7926cf2eaf7d6f..0a546b2649b37ad2a8de2783079d0fe93a24d7ac 100644
--- a/ui/views/win/hwnd_message_handler.cc
+++ b/ui/views/win/hwnd_message_handler.cc
@@ -1009,8 +1009,11 @@ void HWNDMessageHandler::SetFullscreen(bool fullscreen,
 }
 
 void HWNDMessageHandler::SetAspectRatio(float aspect_ratio) {
-  // 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;