[Offline Pages] Snapshotting on timeout of last retry.

chrome/browser/android/offline_pages/prerendering_loader.h

Index: chrome/browser/android/offline_pages/prerendering_loader.h
diff --git a/chrome/browser/android/offline_pages/prerendering_loader.h b/chrome/browser/android/offline_pages/prerendering_loader.h
index 9ea9c84c7500626cbb73b75b94c469c3090ca68c..7e45fef375163996eddbae437e53c3363f45719d 100644
--- a/chrome/browser/android/offline_pages/prerendering_loader.h
+++ b/chrome/browser/android/offline_pages/prerendering_loader.h
@@ -79,6 +79,9 @@ class PrerenderingLoader : public PrerenderAdapter::Observer,
   // SnapshotController::Client implementation:
   void StartSnapshot() override;
 
+  // Returns true if the lowbar of snapshotting a page is met.
+  virtual bool IsLowbarMet();
+
  private:
   // State of the loader (only one request may be active at a time).
   enum class State {
@@ -124,6 +127,9 @@ class PrerenderingLoader : public PrerenderAdapter::Observer,
   // Callback to call when we know more bytes have loaded from the network.
   ProgressCallback progress_callback_;
 
+  // True if the lowbar of snapshotting a page is met.
+  bool is_lowbar_met_;
+
   DISALLOW_COPY_AND_ASSIGN(PrerenderingLoader);
 };