Drop frontbuffers with ui-use-gpu-process, synchronized with browser, decoupled from backbuffer dro…

content/public/common/content_switches.cc

 // Copyright (c) 2012 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 "content/public/common/content_switches.h"
 
 namespace switches {
 
 // By default, file:// URIs cannot read other file:// URIs. This is an
 // override for developers who need the old behavior for testing.
@@ skipping 259 matching lines @@
 // This does NOT enable color management for images. The source is still
 // assumed to be sRGB.
 const char kEnableMonitorProfile[]          = "enable-monitor-profile";
 
 // Enables TLS domain bound certificate extension.
 const char kEnableOriginBoundCerts[]  = "enable-origin-bound-certs";
 
 // Enables partial swaps in the WK compositor on platforms that support it.
 const char kEnablePartialSwap[]             = "enable-partial-swap";
 
+// Enables UI releasing handle to front surface for background tabs on platforms
+// that support it.
+const char kEnableUIReleaseFrontSurface[] = "enable-ui-release-front-surface";
+
 // Enables touch-screen pinch gestures.
 const char kEnablePinch[]                   = "enable-pinch";
 
 // Enable caching of pre-parsed JS script data.  See http://crbug.com/32407.
 const char kEnablePreparsedJsCaching[]      = "enable-preparsed-js-caching";
 
 // Enable privileged WebGL extensions; without this switch such extensions are
 // available only to Chrome extensions.
 const char kEnablePrivilegedWebGLExtensions[] =
     "enable-privileged-webgl-extensions";
@@ skipping 350 matching lines @@
 const char kDefaultTileWidth[]              = "default-tile-width";
 const char kDefaultTileHeight[]             = "default-tile-height";
 
 // Sets the width and height above which a composited layer will get tiled.
 const char kMaxUntiledLayerWidth[]          = "max-untiled-layer-width";
 const char kMaxUntiledLayerHeight[]         = "max-untiled-layer-height";
 
 const char kFixedPositionCreatesStackingContext[]
     = "fixed-position-creates-stacking-context";
 }  // namespace switches