Add support for 'orientation' in Manifest.

content/public/common/manifest.cc

Index: content/public/common/manifest.cc
diff --git a/content/public/common/manifest.cc b/content/public/common/manifest.cc
index d9fa2b26f25e4ea9780e6ce5e2fe2786a6d3f402..9aeedd419193f20e40313c5e797ac44d83c181da 100644
--- a/content/public/common/manifest.cc
+++ b/content/public/common/manifest.cc
@@ -9,7 +9,8 @@ namespace content {
 const size_t Manifest::kMaxIPCStringLength = 4 * 1024;
 
 Manifest::Manifest()
-    : display(DISPLAY_MODE_UNSPECIFIED) {
+    : display(DISPLAY_MODE_UNSPECIFIED),
+      orientation(blink::WebScreenOrientationLockDefault) {
 }
 
 Manifest::~Manifest() {
@@ -19,7 +20,8 @@ bool Manifest::IsEmpty() const {
   return name.is_null() &&
          short_name.is_null() &&
          start_url.is_empty() &&
-         display == DISPLAY_MODE_UNSPECIFIED;
+         display == DISPLAY_MODE_UNSPECIFIED &&
+         orientation == blink::WebScreenOrientationLockDefault;
 }
 
 } // namespace content