Mac: Disable AVSampleBufferDisplayLayer on Mac <10.11

ui/accelerated_widget_mac/ca_renderer_layer_tree.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/accelerated_widget_mac/ca_renderer_layer_tree.h"
 
 #include <AVFoundation/AVFoundation.h>
 #include <CoreMedia/CoreMedia.h>
 #include <CoreVideo/CoreVideo.h>
 #include <GLES2/gl2extchromium.h>
 
 #include "base/command_line.h"
+#include "base/mac/mac_util.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/trace_event/trace_event.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/cocoa/animation_utils.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/gfx/geometry/dip_util.h"
 
 #if !defined(MAC_OS_X_VERSION_10_8) || \
     MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_8
 extern NSString* const AVLayerVideoGravityResize;
@@ skipping 297 matching lines @@
       ca_edge_aa_mask |= kCALayerTopEdge;
     if (edge_aa_mask & GL_CA_LAYER_EDGE_BOTTOM_CHROMIUM)
       ca_edge_aa_mask |= kCALayerBottomEdge;
   }
 
   // Only allow 4:2:0 frames which fill the layer's contents to be promoted to
   // AV layers.
   if (IOSurfaceGetPixelFormat(io_surface) ==
           kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange &&
       contents_rect == gfx::RectF(0, 0, 1, 1)) {
-    use_av_layer = true;
+    // Disable AVSampleBufferDisplayLayer on <10.11 due to reports of memory
+    // leaks on 10.9.
+    // https://crbug.com/631485
+    if (base::mac::IsOSElCapitanOrLater())
+      use_av_layer = true;
   }
 }
 
 CARendererLayerTree::ContentLayer::ContentLayer(ContentLayer&& layer)
     : io_surface(layer.io_surface),
       cv_pixel_buffer(layer.cv_pixel_buffer),
       contents_rect(layer.contents_rect),
       rect(layer.rect),
       background_color(layer.background_color),
       ca_edge_aa_mask(layer.ca_edge_aa_mask),
@@ skipping 316 matching lines @@
     } else {
       // Grey represents a CALayer that has not changed.
       color.reset(CGColorCreateGenericRGB(0.5, 0.5, 0.5, 1));
     }
     [ca_layer setBorderWidth:1];
     [ca_layer setBorderColor:color];
   }
 }
 
 }  // namespace ui