Disk cache: Add test files for another unit test.

net/data/cache_tests/bad_rankings3/contents.txt

+Index file:
+version: 2.1
+entries: 3
+current id: 1
+last crash: 1
+head 0: 0x90000002
+tail 0: 0x90000002
+size 0: 0x1
+head 1: 0x90000001             <----
+tail 1: 0x90000000
+size 1: 0x2
+transaction: 0x0
+-------------------------
+
+Entry at 0xa0010002
+hash: 0x687d1422
+next entry: 0x0
+rankings: 0x90000000
+key length: 13
+key: "the first key"
+key addr: 0x0
+reuse count: 1
+----------
+
+Rankings at 0x90000000
+next: 0x90000000
+prev: 0x90000001
+entry: 0xa0010002
+dirty: 0
+----------
+
+Entry at 0xa0010003
+hash: 0x4a70620e
+next entry: 0x0
+rankings: 0x90000001
+key length: 14
+key: "the second key"
+key addr: 0x0
+reuse count: 0                 <---- list 0
+----------
+
+Rankings at 0x90000001
+next: 0x90000000
+prev: 0x90000001               <----- head
+entry: 0xa0010003
+dirty: 1                       <----- This was actually inserted on list 1
+----------
+
+Entry at 0xa0010004
+hash: 0x63909ecb
+next entry: 0x0
+rankings: 0x90000002
+key length: 14
+key: "some other key"
+key addr: 0x0
+reuse count: 0
+----------
+
+Rankings at 0x90000002
+next: 0x90000002
+prev: 0x90000002
+entry: 0xa0010004
+dirty: 0
+----------
+
+================================
+
+Generated with:
+
+  SetNewEviction();
+  SetMaxSize(20 * 1024 * 1024);
+  InitCache();
+  const char* kName1 = "the first key";
+  const char* kName2 = "the second key";
+  disk_cache::Entry* entry;
+  ASSERT_EQ(net::OK, CreateEntry(kName1, &entry));
+  entry->Close();
+  ASSERT_EQ(net::OK, CreateEntry(kName2, &entry));
+  entry->Close();
+  ASSERT_EQ(net::OK, CreateEntry("some other key", &entry));
+  entry->Close();
+
+  ASSERT_EQ(net::OK, OpenEntry(kName1, &entry));
+  entry->Close();
+
+  ASSERT_EQ(net::OK, OpenEntry(kName2, &entry));
+
+Set a breakpoint on that last line, and when the entry is moved from one list to another, crash the process:
+
+  rankings_->Remove(entry->rankings(), Rankings::NO_USE);
+  rankings_->Insert(entry->rankings(), false, Rankings::LOW_USE);
+  entry->entry()->Store();                                           <---- crash here