[Offline Pages] Make prerenderer notify us of network progress.

chrome/browser/android/offline_pages/prerender_adapter.cc

Index: chrome/browser/android/offline_pages/prerender_adapter.cc
diff --git a/chrome/browser/android/offline_pages/prerender_adapter.cc b/chrome/browser/android/offline_pages/prerender_adapter.cc
index f780cfc4fa265c21d16c671110a8d1e38abc0e3d..e959380a82fd8dd9c4e5ee0f0d3b14a18404494f 100644
--- a/chrome/browser/android/offline_pages/prerender_adapter.cc
+++ b/chrome/browser/android/offline_pages/prerender_adapter.cc
@@ -102,4 +102,15 @@ void PrerenderAdapter::OnPrerenderStop(prerender::PrerenderHandle* handle) {
   }
 }
 
+void PrerenderAdapter::OnPrerenderNetworkBytesChanged(
+    prerender::PrerenderHandle* handle) {
+  if (IsActive()) {
+    DCHECK_EQ(active_handle_.get(), handle);
+    prerender::PrerenderContents* contents = handle->contents();
+    if (!contents)
+      return;
+    observer_->OnPrerenderNetworkBytesChanged(contents->network_bytes());
+  }
+}
+
 }  // namespace offline_pages