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

ash/shell/content_client/shell_content_browser_client.cc

Index: ash/shell/content_client/shell_content_browser_client.cc
diff --git a/ash/shell/content_client/shell_content_browser_client.cc b/ash/shell/content_client/shell_content_browser_client.cc
index 629d4b55920bdddcd6ce9481ecbed62c6a9826fc..93fc834e0b31490f6b36e57febc0cd0858ac07f3 100644
--- a/ash/shell/content_client/shell_content_browser_client.cc
+++ b/ash/shell/content_client/shell_content_browser_client.cc
@@ -5,6 +5,7 @@
 #include "ash/shell/content_client/shell_content_browser_client.h"
 
 #include "ash/shell/content_client/shell_browser_main_parts.h"
+#include "content/shell/shell_browser_context.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace ash {
@@ -23,6 +24,14 @@ content::BrowserMainParts* ShellContentBrowserClient::CreateBrowserMainParts(
   return shell_browser_main_parts_;
 }
 
+net::URLRequestContextGetter* ShellContentBrowserClient::CreateRequestContext(
+    content::BrowserContext* content_browser_context,
+    content::ProtocolHandlerMap* protocol_handlers) {
+  content::ShellBrowserContext* shell_context =
+      static_cast<content::ShellBrowserContext*>(content_browser_context);
+  return shell_context->CreateRequestContext(protocol_handlers);
+}
+
 content::ShellBrowserContext* ShellContentBrowserClient::browser_context() {
   return shell_browser_main_parts_->browser_context();
 }