Command line switch for canvas2d msaa

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index b0ac4d8eddc147b44c7a08c59330578174835d74..24c75cf3cf29fb37cfb4772e3c2b07f1243d7dea 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -6,6 +6,10 @@
 
 namespace switches {
 
+// The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
+// have an effect. 0 disables MSAA.
+const char kAcceleratedCanvas2dMSAASampleCount[] = "canvas-msaa-sample-count";
+
 // By default, file:// URIs cannot read other file:// URIs. This is an
 // override for developers who need the old behavior for testing.
 const char kAllowFileAccessFromFiles[]      = "allow-file-access-from-files";