Implement PushManager#hasPermission

chrome/browser/services/gcm/push_messaging_service_impl.cc

Index: chrome/browser/services/gcm/push_messaging_service_impl.cc
diff --git a/chrome/browser/services/gcm/push_messaging_service_impl.cc b/chrome/browser/services/gcm/push_messaging_service_impl.cc
index ee49c0a12921645e09c7dcb76adb53a4cebe77ad..ed03bff5633d2b1a7e8876782aa86d3146f18039 100644
--- a/chrome/browser/services/gcm/push_messaging_service_impl.cc
+++ b/chrome/browser/services/gcm/push_messaging_service_impl.cc
@@ -29,6 +29,22 @@ namespace gcm {
 
 namespace {
 const int kMaxRegistrations = 1000000;
+
+static blink::WebPushPermissionStatus ToPushPermission(
+    ContentSetting setting) {
+  switch (setting) {
+    case CONTENT_SETTING_ALLOW:
+      return blink::WebPushPermissionStatusGranted;
+    case CONTENT_SETTING_BLOCK:
+      return blink::WebPushPermissionStatusDenied;
+    case CONTENT_SETTING_ASK:
+      return blink::WebPushPermissionStatusDefault;
+    default:
+      NOTREACHED();
+      return blink::WebPushPermissionStatusDenied;
+  }
+}
+
 }  // namespace
 
 // static
@@ -229,6 +245,29 @@ void PushMessagingServiceImpl::Register(
                  callback));
 }
 
+blink::WebPushPermissionStatus PushMessagingServiceImpl::GetPermissionStatus(
+    const GURL& requesting_origin, int renderer_id, int render_frame_id) {
+  content::RenderFrameHost* render_frame_host =
+      content::RenderFrameHost::FromID(renderer_id, render_frame_id);
+
+  // The frame doesn't exist any more, or we received a bad frame id.
+  if (!render_frame_host)
+    return blink::WebPushPermissionStatusDenied;
+
+  content::WebContents* web_contents =
+      content::WebContents::FromRenderFrameHost(render_frame_host);
+
+  // The page doesn't exist any more or we got a bad render frame host.
+  if (!web_contents)
+    return blink::WebPushPermissionStatusDenied;
+
+  GURL embedder_origin = web_contents->GetLastCommittedURL().GetOrigin();
+  gcm::PushMessagingPermissionContext* permission_context =
+        gcm::PushMessagingPermissionContextFactory::GetForProfile(profile_);
+  return ToPushPermission(
+      permission_context->PermissionStatus(requesting_origin, embedder_origin));
+}
+
 void PushMessagingServiceImpl::RegisterEnd(
     const content::PushMessagingService::RegisterCallback& callback,
     const std::string& registration_id,