Interface for associating in-memory hint bytes with disk cache entries.

net/http/mock_http_cache.h

Index: net/http/mock_http_cache.h
diff --git a/net/http/mock_http_cache.h b/net/http/mock_http_cache.h
index bc7847b7bfff8b541ada5049b7a6c2453141b661..198c281a6ed5234c9d09b0e03ab414f1c8ed0474 100644
--- a/net/http/mock_http_cache.h
+++ b/net/http/mock_http_cache.h
@@ -70,6 +70,9 @@ class MockDiskEntry : public disk_cache::Entry,
   void CancelSparseIO() override;
   int ReadyForSparseIO(const CompletionCallback& completion_callback) override;
 
+  uint8_t memory_entry_data() const { return memory_entry_data_; }
+  void set_memory_entry_data(uint8_t val) { memory_entry_data_ = val; }
+
   // Fail most subsequent requests.
   void set_fail_requests() { fail_requests_ = true; }
 
@@ -112,6 +115,7 @@ class MockDiskEntry : public disk_cache::Entry,
 
   std::string key_;
   std::vector<char> data_[kNumCacheEntryDataIndices];
+  unsigned char memory_entry_data_;
   int test_mode_;
   bool doomed_;
   bool sparse_;
@@ -157,6 +161,8 @@ class MockDiskCache : public disk_cache::Backend {
   size_t DumpMemoryStats(
       base::trace_event::ProcessMemoryDump* pmd,
       const std::string& parent_absolute_name) const override;
+  uint8_t GetMemoryEntryData(const std::string& key) override;
+  void SetMemoryEntryData(const std::string& key, uint8_t data) override;
 
   // Returns number of times a cache entry was successfully opened.
   int open_count() const { return open_count_; }
@@ -176,6 +182,12 @@ class MockDiskCache : public disk_cache::Backend {
   // Makes sure that CreateEntry is not called twice for a given key.
   void set_double_create_check(bool value) { double_create_check_ = value; }
 
+  // Determines whether to provide the GetMemoryEntryData/SetMemoryEntryData
+  // interface.  Default is true
+  void set_support_memory_entry_data(bool value) {
+    support_memory_entry_data_ = value;
+  }
+
   // Makes all requests for data ranges to fail as not implemented.
   void set_fail_sparse_requests() { fail_sparse_requests_ = true; }
 
@@ -209,6 +221,7 @@ class MockDiskCache : public disk_cache::Backend {
   bool soft_failures_;
   bool double_create_check_;
   bool fail_sparse_requests_;
+  bool support_memory_entry_data_;
 
   // Used for pause and restart.
   MockDiskEntry::DeferOp defer_op_;