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 149 matching lines @@
     "disable-gpu-memory-buffer-compositor-resources";
 
 // Disable GpuMemoryBuffer backed VideoFrames.
 const char kDisableGpuMemoryBufferVideoFrames[] =
     "disable-gpu-memory-buffer-video-frames";
 
 // Disable the limit on the number of times the GPU process may be restarted
 // This switch is intended only for tests.
 const char kDisableGpuProcessCrashLimit[] = "disable-gpu-process-crash-limit";
 
+// Disable async GL worker context. Overrides kEnableGpuAsyncWorkerContext.
+const char kDisableGpuAsyncWorkerContext[] = "disable-gpu-async-worker-context";
+
 // Disable GPU rasterization, i.e. rasterize on the CPU only.
 // Overrides the kEnableGpuRasterization and kForceGpuRasterization flags.
 const char kDisableGpuRasterization[]       = "disable-gpu-rasterization";
 
 // When using CPU rasterizing disable low resolution tiling. This uses
 // less power, particularly during animations, but more white may be seen
 // during fast scrolling especially on slower devices.
 const char kDisableLowResTiling[] = "disable-low-res-tiling";
 
 // Disable the GPU process sandbox.
@@ skipping 181 matching lines @@
 // Enables Web Platform features that are in development.
 const char kEnableExperimentalWebPlatformFeatures[] =
     "enable-experimental-web-platform-features";
 
 // Comma-separated list of feature names to enable. See also kDisableFeatures.
 const char kEnableFeatures[] = "enable-features";
 
 // Enable Web Bluetooth.
 const char kEnableWebBluetooth[] = "enable-web-bluetooth";
 
+// Makes the GL worker context run asynchronously by using a separate stream.
+const char kEnableGpuAsyncWorkerContext[] = "enable-gpu-async-worker-context";
+
 // Specify that all compositor resources should be backed by GPU memory buffers.
 const char kEnableGpuMemoryBufferCompositorResources[] =
     "enable-gpu-memory-buffer-compositor-resources";
 
 // 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 +
@@ skipping 640 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