DOM Storage: Add renderer-process IPC code.

webkit/api/public/WebKitClient.h

Index: webkit/api/public/WebKitClient.h
===================================================================
--- webkit/api/public/WebKitClient.h	(revision 21404)
+++ webkit/api/public/WebKitClient.h	(working copy)
@@ -40,6 +40,7 @@
     class WebMimeRegistry;
     class WebPluginListBuilder;
     class WebSandboxSupport;
+    class WebStorageNamespace;
     class WebString;
     class WebThemeEngine;
     class WebURL;
@@ -62,6 +63,17 @@
         virtual WebThemeEngine* themeEngine() = 0;
 
 
+        // DOM Storage --------------------------------------------------
+
+        // Return a LocalStorage namespace that corresponds to the following
+        // path.
+        virtual WebStorageNamespace* createLocalStorageNamespace(
+            const WebString& path) = 0;
+
+        // Return a new SessionStorage namespace.
+        virtual WebStorageNamespace* createSessionStorageNamespace() = 0;
+
+
         // File ----------------------------------------------------------------
 
         virtual bool getFileSize(const WebString& path, long long& result) = 0;