Http Cache: Add support for resuming downloading a...

net/http/partial_data.h

Index: net/http/partial_data.h
===================================================================
--- net/http/partial_data.h	(revision 25542)
+++ net/http/partial_data.h	(working copy)
@@ -32,7 +32,8 @@
 class PartialData {
  public:
   PartialData()
-      : range_present_(false), final_range_(false), sparse_entry_(true) {}
+      : range_present_(false), final_range_(false), sparse_entry_(true),
+        truncated_(false) {}
   ~PartialData() {}
 
   // Performs initialization of the object by parsing the request |headers|
@@ -62,9 +63,10 @@
   bool IsLastRange() const;
 
   // Extracts info from headers already stored in the cache. Returns false if
-  // there is any problem with the headers.
+  // there is any problem with the headers. |truncated| should be true if we
+  // have an incomplete 200 entry.
   bool UpdateFromStoredHeaders(const HttpResponseHeaders* headers,
-                               disk_cache::Entry* entry);
+                               disk_cache::Entry* entry, bool truncated);
 
   // Returns true if the requested range is valid given the stored data.
   bool IsRequestedRangeOK();
@@ -111,6 +113,7 @@
   bool range_present_;  // True if next range entry is already stored.
   bool final_range_;
   bool sparse_entry_;
+  bool truncated_;  // We have an incomplete 200 stored.
 
   DISALLOW_COPY_AND_ASSIGN(PartialData);
 };