Implement a method to get the total size of a cache entry

net/disk_cache/entry_unittest.cc

Index: net/disk_cache/entry_unittest.cc
diff --git a/net/disk_cache/entry_unittest.cc b/net/disk_cache/entry_unittest.cc
index fca62e354c1c47c9c4774526b678a3648e1fbbe3..ad3f4c974c182d3089b743ec3b5037ac59437a55 100644
--- a/net/disk_cache/entry_unittest.cc
+++ b/net/disk_cache/entry_unittest.cc
@@ -3707,10 +3707,14 @@ TEST_F(DiskCacheEntryTest, SimpleCacheStream1SizeChanges) {
   ASSERT_THAT(CreateEntry(key, &entry), IsOk());
   EXPECT_TRUE(entry);
 
+  long initial_entry_size = entry->GetEntrySize();
+  DCHECK_GE(initial_entry_size, static_cast<long>(key.size()));
+
   // Write something into stream0.
   EXPECT_EQ(kSize, WriteData(entry, 0, 0, buffer.get(), kSize, false));
   EXPECT_EQ(kSize, ReadData(entry, 0, 0, buffer_read.get(), kSize));
   EXPECT_EQ(0, memcmp(buffer->data(), buffer_read->data(), kSize));
+  DCHECK_EQ(initial_entry_size + kSize, entry->GetEntrySize());
   entry->Close();
 
   // Extend stream1.
@@ -3718,6 +3722,7 @@ TEST_F(DiskCacheEntryTest, SimpleCacheStream1SizeChanges) {
   int stream1_size = 100;
   EXPECT_EQ(0, WriteData(entry, 1, stream1_size, buffer.get(), 0, false));
   EXPECT_EQ(stream1_size, entry->GetDataSize(1));
+  DCHECK_EQ(initial_entry_size + kSize + stream1_size, entry->GetEntrySize());
   entry->Close();
 
   // Check that stream0 data has not been modified and that the EOF record for
@@ -3753,6 +3758,7 @@ TEST_F(DiskCacheEntryTest, SimpleCacheStream1SizeChanges) {
   stream1_size = 50;
   EXPECT_EQ(0, WriteData(entry, 1, stream1_size, buffer.get(), 0, true));
   EXPECT_EQ(stream1_size, entry->GetDataSize(1));
+  DCHECK_EQ(initial_entry_size + kSize + stream1_size, entry->GetEntrySize());
   entry->Close();
 
   // Check that stream0 data has not been modified.