Add flag to enable antialiased clipping in HTML5 canvas

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"
 
 #include "base/command_line.h"
 
 namespace switches {
 
@@ skipping 260 matching lines @@
 // Disable rasterizer that writes directly to GPU memory associated with tiles.
 // Overrides the kEnableZeroCopy flag.
 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";
 
+// Enable antialiasing on 2d canvas clips (as opposed to draw operations)
+const char kEnable2dCanvasClipAntialiasing[] = "enable-2d-canvas-clip-aa";
+
 // Enable partially decoding jpeg images using the GPU.
 // At least YUV decoding will be accelerated when using this flag.
 // Has no effect unless GPU rasterization is enabled.
 const char kEnableAcceleratedJpegDecoding[] =
     "enable-accelerated-jpeg-decoding";
 
 // Enable bleeding-edge code to make Chrome draw content faster. The changes
 // behind this path are very likely to break lots of content.
 // ** DO NOT use this flag unless you know what you are doing. **
 const char kEnableBleedingEdgeRenderingFastPaths[] =
@@ skipping 669 matching lines @@
 #endif
 
 #if defined(ENABLE_PLUGINS)
 // Enables the plugin power saver feature.
 const char kEnablePluginPowerSaver[] = "enable-plugin-power-saver";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches