Chromium pieces to use the WebKit support for isolation file:// documents in...

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
===================================================================
--- chrome/common/chrome_switches.cc	(revision 39247)
+++ chrome/common/chrome_switches.cc	(working copy)
@@ -17,6 +17,10 @@
 // is launched on the command line (e.g. by Selenium).  Only needed on Mac.
 const char kActivateOnLaunch[] = "activate-on-launch";
 
+// 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";
+
 // Allows debugging of sandboxed processes (see zygote_main_linux.cc).
 const char kAllowSandboxDebugging[]         = "allow-sandbox-debugging";