gpu: Add flag for enabling asynchronous worker context.

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 "build/build_config.h"
 #include "content/public/common/content_switches.h"
 
 namespace switches {
 
 // The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
@@ skipping 363 matching lines @@
 
 // Enable GpuMemoryBuffer backed VideoFrames.
 const char kEnableGpuMemoryBufferVideoFrames[] =
     "enable-gpu-memory-buffer-video-frames";
 
 // Allow heuristics to determine when a layer tile should be drawn with the
 // Skia GPU backend. Only valid with GPU accelerated compositing +
 // impl-side painting.
 const char kEnableGpuRasterization[]        = "enable-gpu-rasterization";
 
+// Makes the worker GL context run asynchronously by using a separate stream.
+const char kEnableGpuAsyncWorkerContext[]   = "enable-gpu-async-worker-context";
+
 // When using CPU rasterizing generate low resolution tiling. Low res
 // tiles may be displayed during fast scrolls especially on slower devices.
 const char kEnableLowResTiling[] = "enable-low-res-tiling";
 
 // Dynamically apply color profiles to web content images.
 const char kEnableImageColorProfiles[]      = "enable-image-color-profiles";
 
 // Force logging to be enabled.  Logging is disabled by default in release
 // builds.
 const char kEnableLogging[]                 = "enable-logging";
@@ skipping 624 matching lines @@
 const char kMemoryPressureThresholdsMb[] = "memory-pressure-thresholds-mb";
 
 // Enables the exporting of the tracing events to ETW. This is only supported on
 // Windows Vista and later.
 const char kTraceExportEventsToETW[] = "trace-export-events-to-etw";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches