mandoline filesystem: Save cookie data to the mojo:filesystem.

sql/mojo/mojo_vfs.cc

Index: sql/mojo/mojo_vfs.cc
diff --git a/sql/mojo/mojo_vfs.cc b/sql/mojo/mojo_vfs.cc
index 6e38af9704032a15b0cf1bbd329e6c4da212c560..8de6109e79f9ce7ed304c98e583692b72c1dbd71 100644
--- a/sql/mojo/mojo_vfs.cc
+++ b/sql/mojo/mojo_vfs.cc
@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "base/rand_util.h"
+#include "base/strings/stringprintf.h"
 #include "components/filesystem/public/interfaces/file.mojom.h"
 #include "components/filesystem/public/interfaces/file_system.mojom.h"
 #include "components/filesystem/public/interfaces/types.mojom.h"
@@ -245,10 +246,19 @@ int MojoVFSOpen(sqlite3_vfs* mojo_vfs,
   if (flags & SQLITE_OPEN_DELETEONCLOSE)
     open_flags |= filesystem::kDeleteOnClose;
 
+  mojo::String mojo_name;
+  if (name) {
+    mojo_name = name;
+  } else {
+    DCHECK(flags & SQLITE_OPEN_DELETEONCLOSE);
+    static int temp_number = 0;
+    mojo_name = base::StringPrintf("Temp_%d.db", temp_number++);

[Scott Hess - ex-Googler, 2015/07/06 20:47:59]

AFAICT this is in the same namespace as other databases?  Might be worthwhile to
have the named case CHECK that the name is not of this form.

+  }
+
   // Grab the incoming file
   filesystem::FilePtr file_ptr;
   filesystem::FileError error = filesystem::FILE_ERROR_FAILED;
-  GetRootDirectory(mojo_vfs)->OpenFile(mojo::String(name), GetProxy(&file_ptr),
+  GetRootDirectory(mojo_vfs)->OpenFile(mojo_name, GetProxy(&file_ptr),
                                        open_flags, Capture(&error));
   GetRootDirectory(mojo_vfs).WaitForIncomingResponse();
   if (error != filesystem::FILE_ERROR_OK) {