Record Rappor metrics even for constant permissions.

chrome/browser/permissions/permission_manager.cc

Index: chrome/browser/permissions/permission_manager.cc
diff --git a/chrome/browser/permissions/permission_manager.cc b/chrome/browser/permissions/permission_manager.cc
index bad0233269519ee55361667b5b8253d1b4503e25..8578187e384cf12aa89fbb355d90c8b8086d19f2 100644
--- a/chrome/browser/permissions/permission_manager.cc
+++ b/chrome/browser/permissions/permission_manager.cc
@@ -17,6 +17,7 @@
 #include "chrome/browser/permissions/permission_context_base.h"
 #include "chrome/browser/permissions/permission_manager_factory.h"
 #include "chrome/browser/permissions/permission_request_id.h"
+#include "chrome/browser/permissions/permission_uma_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/push_messaging/push_messaging_permission_context.h"
 #include "chrome/browser/storage/durable_storage_permission_context.h"
@@ -293,6 +294,11 @@ int PermissionManager::RequestPermissions(
 
     if (IsConstantPermission(permission) ||
         !GetPermissionContext(permission)) {
+      if (IsConstantPermission(permission)) {

[mlamouri (slow - plz ping), 2016/05/31 15:40:04]

I think you could even remove the check. |GetPermissionContext| isn't expecting
to return |nullptr| in a normal situation so I wouldn't make this code more
complicated.

[Takashi Toyoshima, 2016/06/01 05:11:52]

Done.

+        // Track permission request usages even for constant permissions.
+        PermissionUmaUtil::PermissionRequested(permission, requesting_origin,
+                                               embedding_origin, profile_);
+      }
       OnPermissionsRequestResponseStatus(request_id, i,
           GetPermissionStatus(permission, requesting_origin, embedding_origin));
       continue;