Introduce NetworkDelegate's implementation in extensions.

extensions/shell/browser/shell_browser_context.h

Index: extensions/shell/browser/shell_browser_context.h
diff --git a/extensions/shell/browser/shell_browser_context.h b/extensions/shell/browser/shell_browser_context.h
index 305ab2b763b70b0a991ce73de894be6715c3612e..a68198b73c1eb2210ab22efab88a0ede7343f119 100644
--- a/extensions/shell/browser/shell_browser_context.h
+++ b/extensions/shell/browser/shell_browser_context.h
@@ -12,6 +12,7 @@
 
 namespace extensions {
 
+class InfoMap;
 class ShellSpecialStoragePolicy;
 
 // The BrowserContext used by the content, apps and extensions systems in
@@ -25,6 +26,17 @@ class ShellBrowserContext : public content::ShellBrowserContext {
   virtual content::BrowserPluginGuestManager* GetGuestManager() OVERRIDE;
   virtual storage::SpecialStoragePolicy* GetSpecialStoragePolicy() OVERRIDE;
 
+  // content::ShellBrowserContext implementation.
+  virtual content::ShellURLRequestContextGetter* CreateURLRequestContextGetter(
+      content::ProtocolHandlerMap* protocol_handlers,
+      content::URLRequestInterceptorScopedVector request_interceptors) OVERRIDE;
+
+  net::URLRequestContextGetter* CreateRequestContext(
+      content::ProtocolHandlerMap* protocol_handlers,
+      content::URLRequestInterceptorScopedVector request_interceptors,
+      content::BrowserContext* browser_context,
+      InfoMap* extension_info_map);
+
   // HACK: Pad the virtual function table so we trip an assertion if someone
   // tries to use |this| as a Profile.
   virtual void ProfileFunctionCallOnNonProfileBrowserContext1();