Add related_applications field to manifest parser.

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 389754189cecbc5713782cd182839a1e5a2bc8bf..5ee29630588028dfc27073e2c158e44aff3c137a 100644
--- a/content/public/common/manifest.cc
+++ b/content/public/common/manifest.cc
@@ -16,9 +16,16 @@ Manifest::Icon::Icon()
 Manifest::Icon::~Icon() {
 }
 
+Manifest::RelatedApplication::RelatedApplication() {
+}
+
+Manifest::RelatedApplication::~RelatedApplication() {
+}
+
 Manifest::Manifest()
     : display(DISPLAY_MODE_UNSPECIFIED),
       orientation(blink::WebScreenOrientationLockDefault),
+      prefer_related_applications(false),
       gcm_user_visible_only(false) {
 }
 
@@ -32,6 +39,8 @@ bool Manifest::IsEmpty() const {
          display == DISPLAY_MODE_UNSPECIFIED &&
          orientation == blink::WebScreenOrientationLockDefault &&
          icons.empty() &&
+         related_applications.empty() &&
+         !prefer_related_applications &&
          gcm_sender_id.is_null() &&
          !gcm_user_visible_only;
 }