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

chrome/browser/android/offline_pages/prerender_adapter_unittest.cc

Index: chrome/browser/android/offline_pages/prerender_adapter_unittest.cc
diff --git a/chrome/browser/android/offline_pages/prerender_adapter_unittest.cc b/chrome/browser/android/offline_pages/prerender_adapter_unittest.cc
index 2587ea30607ed5017db9ca8f4075b06cc2badce5..f8f39a5eb2c89acbaeb73c813e8abf87f5c98637 100644
--- a/chrome/browser/android/offline_pages/prerender_adapter_unittest.cc
+++ b/chrome/browser/android/offline_pages/prerender_adapter_unittest.cc
@@ -113,6 +113,7 @@ class PrerenderAdapterTest : public testing::Test,
   void OnPrerenderStopLoading() override;
   void OnPrerenderDomContentLoaded() override;
   void OnPrerenderStop() override;
+  void OnPrerenderNetworkBytesChanged(int64_t bytes) override;
 
   void SetUp() override;
 
@@ -168,6 +169,8 @@ void PrerenderAdapterTest::OnPrerenderStop() {
   observer_stop_called_ = true;
 }
 
+void PrerenderAdapterTest::OnPrerenderNetworkBytesChanged(int64_t bytes) {}
+
 void PrerenderAdapterTest::SetUp() {
   if (base::SysInfo::IsLowEndDevice())
     return;