[WIP] Add Chromium-side support for the Screen Orientation API

content/public/browser/content_browser_client.cc

Index: content/public/browser/content_browser_client.cc
diff --git a/content/public/browser/content_browser_client.cc b/content/public/browser/content_browser_client.cc
index c669268c36a1f752c6b469dddd4e5f23e0850dc9..09ebe0ed931eecb167354a059275bb9eae060d08 100644
--- a/content/public/browser/content_browser_client.cc
+++ b/content/public/browser/content_browser_client.cc
@@ -292,6 +292,11 @@ VibrationProvider* ContentBrowserClient::OverrideVibrationProvider() {
   return NULL;
 }
 
+ScreenOrientationProvider*
+    ContentBrowserClient::OverrideScreenOrientationProvider() {
+  return NULL;
+}
+
 #if defined(OS_WIN)
 const wchar_t* ContentBrowserClient::GetResourceDllName() {
   return NULL;