Add a way to send the resource percentage signal to the RC.

components/offline_pages/core/background/offliner_stub.cc

Index: components/offline_pages/core/background/offliner_stub.cc
diff --git a/components/offline_pages/core/background/offliner_stub.cc b/components/offline_pages/core/background/offliner_stub.cc
index 58b80a159286601b889932e8cecc78754d00f547..5e1cac4adfd82ff6e118b9fd3a60ee12fc3e0432 100644
--- a/components/offline_pages/core/background/offliner_stub.cc
+++ b/components/offline_pages/core/background/offliner_stub.cc
@@ -14,7 +14,9 @@ OfflinerStub::OfflinerStub()
     : disable_loading_(false),
       enable_callback_(false),
       cancel_called_(false),
-      snapshot_on_last_retry_(false) {}
+      snapshot_on_last_retry_(false),
+      started_count_(0LL),
+      completed_count_(0LL) {}
 
 OfflinerStub::~OfflinerStub() {}
 
@@ -60,4 +62,24 @@ bool OfflinerStub::HandleTimeout(int64_t request_id) {
   return false;
 }
 
+void OfflinerStub::ObserveResourceTracking(ResourceDataType type,
+                                           int64_t started_count,
+                                           int64_t completed_count) {
+  started_count_ = started_count;
+  completed_count_ = completed_count;
+}
+
+// Returns the most recently seen counts for a specific resource type.
+// TODO(petewil): Today this just supports images, later support all types.
+void OfflinerStub::GetResourcePercentageCounts(const ResourceDataType type,
+                                               int64_t* started,
+                                               int64_t* completed) {
+  if (type == ResourceDataType::IMAGE) {
+    if (started)
+      *started = started_count_;
+    if (completed)
+      *completed = completed_count_;
+  }
+}
+
 }  // namespace offline_pages