Start migrating the disk cache to using FilePath.

net/tools/crash_cache/crash_cache.cc

Index: net/tools/crash_cache/crash_cache.cc
diff --git a/net/tools/crash_cache/crash_cache.cc b/net/tools/crash_cache/crash_cache.cc
index 5272e17b1119ab5e24472c440d86efbb77f72e2d..36c64e27637d20df5fce70fa8dea69b1c9b4fd38 100644
--- a/net/tools/crash_cache/crash_cache.cc
+++ b/net/tools/crash_cache/crash_cache.cc
@@ -214,7 +214,8 @@ int LoadOperations(const std::wstring& path, RankCrashes action) {
   DCHECK(action >= disk_cache::INSERT_LOAD_1);
 
   // Work with a tiny index table (16 entries)
-  disk_cache::BackendImpl* cache = new disk_cache::BackendImpl(path, 0xf);
+  disk_cache::BackendImpl* cache =
+      new disk_cache::BackendImpl(FilePath::FromWStringHack(path), 0xf);
   if (!cache || !cache->SetMaxSize(0x100000) || !cache->Init() ||
       cache->GetEntryCount())
     return GENERIC;