Persist sessionStorage on disk.

chrome/browser/profiles/profile_impl.h

Index: chrome/browser/profiles/profile_impl.h
diff --git a/chrome/browser/profiles/profile_impl.h b/chrome/browser/profiles/profile_impl.h
index a7068e7d47322a973d0a1160d19b630bbc674d3d..a43d6ea5abeb62b7ad4857bda3678dfd720b3e1e 100644
--- a/chrome/browser/profiles/profile_impl.h
+++ b/chrome/browser/profiles/profile_impl.h
@@ -67,6 +67,7 @@ class ProfileImpl : public Profile,
       GetSpeechRecognitionPreferences() OVERRIDE;
   virtual bool DidLastSessionExitCleanly() OVERRIDE;
   virtual quota::SpecialStoragePolicy* GetSpecialStoragePolicy() OVERRIDE;
+  virtual bool ShouldSaveSessionStorageOnDisk() const OVERRIDE;

[sail, 2012/07/11 16:56:11]

I'm not sure what session storage is. Does this really need to be a per profile
flag? Currently the implementation is not profile specific. Should there be a
TODO somewhere?

[marja, 2012/07/12 09:22:03]

sessionStorage is part of the HTML5 DOM storage specification, see e.g.,
http://www.whatwg.org/specs/web-apps/current-work/#storage

I changed the Profile-related parts (according to jam's comments), so this
function doesn't exist any more, but instead ProfileImpl ctor retrieves a
DOMStorageContext and calls SetSaveSessionStorageOnDisk on it. This also makes
the changes to Profile minimal.

The DOM storage is per-profile (the data is stored under the profile directory),
and for incognito profiles both localStorage and sessionStorage are stored only
in memory.

 
   // Profile implementation:
   virtual std::string GetProfileName() OVERRIDE;