Introduce background Download process to android

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 280 matching lines @@
 
 // Disable rasterizer that writes directly to GPU memory associated with tiles.
 const char kDisableZeroCopy[]                = "disable-zero-copy";
 
 // Specifies if the |DOMAutomationController| needs to be bound in the
 // renderer. This binding happens on per-frame basis and hence can potentially
 // be a performance bottleneck. One should only enable it when automating dom
 // based tests.
 const char kDomAutomationController[]       = "dom-automation";
 
+// Causes the process to run as a download subprocess.
+const char kDownloadProcess[]               = "download";
+
 // Enable antialiasing on 2d canvas clips (as opposed to draw operations)
 const char kEnable2dCanvasClipAntialiasing[] = "enable-2d-canvas-clip-aa";
 
 // Disable partially decoding jpeg images using the GPU.
 // At least YUV decoding will be accelerated when not using this flag.
 // Has no effect unless GPU rasterization is enabled.
 const char kDisableAcceleratedJpegDecoding[] =
     "disable-accelerated-jpeg-decoding";
 
 // Enables LCD text.
@@ skipping 685 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