Add support for 'orientation' in Manifest.

content/public/common/manifest.h

Index: content/public/common/manifest.h
diff --git a/content/public/common/manifest.h b/content/public/common/manifest.h
index c790babe69598869765cd4d78acf1f2970d48fb9..35a49b138a68b490365b8cd93e0b0eb55952d9d5 100644
--- a/content/public/common/manifest.h
+++ b/content/public/common/manifest.h
@@ -7,6 +7,7 @@
 
 #include "base/strings/nullable_string16.h"
 #include "content/common/content_export.h"
+#include "third_party/WebKit/public/platform/WebScreenOrientationLockType.h"
 #include "url/gurl.h"
 
 namespace content {
@@ -43,6 +44,10 @@ struct CONTENT_EXPORT Manifest {
   // present.
   DisplayMode display;
 
+  // Set to blink::WebScreenOrientationLockDefault if the parsing failed or the
+  // field was not present.
+  blink::WebScreenOrientationLockType orientation;
+
   // Maximum length for all the strings inside the Manifest when it is sent over
   // IPC. The renderer process should truncate the strings before sending the
   // Manifest and the browser process must do the same when receiving it.