ash_shell: Fix a crash when creating a WebView in the views-examples window.

ash/shell/content_client/shell_content_browser_client.h

Index: ash/shell/content_client/shell_content_browser_client.h
diff --git a/ash/shell/content_client/shell_content_browser_client.h b/ash/shell/content_client/shell_content_browser_client.h
index f4df45ecda5033b9651c274584c88dc9df0fec28..d90909aa656481a1e6f6c2776219f3917b7241bc 100644
--- a/ash/shell/content_client/shell_content_browser_client.h
+++ b/ash/shell/content_client/shell_content_browser_client.h
@@ -29,6 +29,9 @@ class ShellContentBrowserClient : public content::ContentBrowserClient {
   // Overridden from content::ContentBrowserClient:
   virtual content::BrowserMainParts* CreateBrowserMainParts(
       const content::MainFunctionParams& parameters) OVERRIDE;
+  virtual net::URLRequestContextGetter* CreateRequestContext(
+      content::BrowserContext* browser_context,
+      content::ProtocolHandlerMap* protocol_handlers) OVERRIDE;
 
   content::ShellBrowserContext* browser_context();