GTTF: Make net_unittests run successfully with parallel test launcher

net/disk_cache/disk_cache_test_util.h

Index: net/disk_cache/disk_cache_test_util.h
diff --git a/net/disk_cache/disk_cache_test_util.h b/net/disk_cache/disk_cache_test_util.h
index f6348e9ada7aac785c24cbc6bc9b867d4f24de24..f4864bb88075e72f1598c0ade8382adf5a991e76 100644
--- a/net/disk_cache/disk_cache_test_util.h
+++ b/net/disk_cache/disk_cache_test_util.h
@@ -11,6 +11,7 @@
 #include "base/callback.h"
 #include "base/file_path.h"
 #include "base/message_loop.h"
+#include "base/scoped_temp_dir.h"
 #include "base/timer.h"
 #include "build/build_config.h"
 
@@ -20,11 +21,8 @@ bool CreateCacheTestFile(const FilePath& name);
 // Deletes all file son the cache.
 bool DeleteCache(const FilePath& path);
 
-// Copies a set of cache files from the data folder to the test folder.
-bool CopyTestCache(const std::string& name);
-
-// Gets the path to the cache test folder.
-FilePath GetCacheFilePath();
+// Copies a set of cache files from the data folder to the destination folder.
+bool CopyTestCache(const std::string& name, const FilePath& destination);
 
 // Fills buffer with random values (may contain nulls unless no_nulls is true).
 void CacheTestFillBuffer(char* buffer, size_t len, bool no_nulls);
@@ -40,14 +38,12 @@ bool CheckCacheIntegrity(const FilePath& path, bool new_eviction);
 class ScopedTestCache {
  public:
   ScopedTestCache();
-  // Use a specific folder name.
-  explicit ScopedTestCache(const std::string& name);
   ~ScopedTestCache();
 
-  FilePath path() const { return path_; }
+  FilePath path() const { return temp_dir_.path(); }
 
  private:
-  const FilePath path_;  // Path to the cache test folder.
+  ScopedTempDir temp_dir_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedTestCache);
 };