Persist sessionStorage on disk.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 43af00e6418587d181f4af446c96c317f31eff03..b7c4edc93a771ea15615f0911701a6da6187bfda 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -609,6 +609,11 @@ const char kEnablePasswordGeneration[]      = "enable-password-generation";
 const char kEnableResourceContentSettings[] =
     "enable-resource-content-settings";
 
+// Enables experimental features of better session restore. See also

[Peter Kasting, 2012/08/07 01:31:54]

Nit: This comment is vague ("experimental features"?).

Can we get by without a flag at all?  Seems like you could just check this in
enabled, and go back and revisit if there are problems.

[marja, 2012/08/07 07:31:22]

We agreed to put the features first behind the flag so it's easy to disable the
features with a small change (e.g., reverting the CL which turns the feature on
by default). This sessionStorage feature is the experimentalest of them all.

I changed the comment though to mention sessionStorage since it's the only (and
the last) experimental feature this flag will affect.

+// kDisableRestoreSessionState which disables the less exprimental features
+// which are on by default.
+const char kEnableRestoreSessionState[]     = "enable-restore-session-state";
+
 // Enables the installation and usage of Portable Native Client.
 const char kEnablePnacl[]                   = "enable-pnacl";