From 6a506a765673da389efd6c4715425d22f16ceb01 Mon Sep 17 00:00:00 2001
From: "@anulman" <@anulman>
Date: Fri, 24 Sep 2021 13:38:11 -0400
Subject: [PATCH] fix: BrowserView drag now delegates to the OS when possible

---
 shell/browser/native_browser_view_mac.mm | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/shell/browser/native_browser_view_mac.mm b/shell/browser/native_browser_view_mac.mm
index 06a86ebc0e0b4..b5a25c747eb53 100644
--- a/shell/browser/native_browser_view_mac.mm
+++ b/shell/browser/native_browser_view_mac.mm
@@ -59,7 +59,8 @@ + (void)load {
 }
 
 - (BOOL)mouseDownCanMoveWindow {
-  return NO;
+  return
+      [self.window respondsToSelector:@selector(performWindowDragWithEvent:)];
 }
 
 - (BOOL)acceptsFirstMouse:(NSEvent*)event {
@@ -85,16 +86,15 @@ - (NSView*)hitTest:(NSPoint)point {
 - (void)mouseDown:(NSEvent*)event {
   [super mouseDown:event];
 
-  if ([self.window respondsToSelector:@selector(performWindowDragWithEvent)]) {
+  if ([self.window respondsToSelector:@selector(performWindowDragWithEvent:)]) {
     // According to Google, using performWindowDragWithEvent:
     // does not generate a NSWindowWillMoveNotification. Hence post one.
     [[NSNotificationCenter defaultCenter]
         postNotificationName:NSWindowWillMoveNotification
                       object:self];
 
-    if (@available(macOS 10.11, *)) {
-      [self.window performWindowDragWithEvent:event];
-    }
+    [self.window performWindowDragWithEvent:event];
+
     return;
   }
 
@@ -106,7 +106,7 @@ - (void)mouseDown:(NSEvent*)event {
 }
 
 - (void)mouseDragged:(NSEvent*)event {
-  if ([self.window respondsToSelector:@selector(performWindowDragWithEvent)]) {
+  if ([self.window respondsToSelector:@selector(performWindowDragWithEvent:)]) {
     return;
   }