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

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index 38a3c6fb4ddf3225d8772bc7663b70cd27ab7ac7..032c283fdf04b7e5e34a5cfbd3e14aab4315b522 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -89,6 +89,7 @@ class RenderProcessHost;
 class RenderViewHost;
 class RenderViewHostDelegateView;
 class ResourceContext;
+class ScreenOrientationProvider;
 class SiteInstance;
 class SpeechRecognitionManagerDelegate;
 class VibrationProvider;
@@ -591,6 +592,14 @@ class CONTENT_EXPORT ContentBrowserClient {
   // information.
   virtual VibrationProvider* OverrideVibrationProvider();
 
+  // Allows an embedder to return its own ScreenOrientationProvider
+  // implementation.
+  // Return NULL to use the default one for the platform to be created.
+  // FYI: Used by an external project; please don't remove.
+  // Contact Viatcheslav Ostapenko at sl.ostapenko@samsung.com for more
+  // information.
+  virtual ScreenOrientationProvider* OverrideScreenOrientationProvider();
+
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   // Populates |mappings| with all files that need to be mapped before launching
   // a child process.