Hookup the PpdProvider in the printer setup flow.

chromeos/printing/ppd_cache.cc

Index: chromeos/printing/ppd_cache.cc
diff --git a/chromeos/printing/ppd_cache.cc b/chromeos/printing/ppd_cache.cc
index 2726b8ac95ecf3f678fd3c76d9fbd02ca14a039e..2f8b027652cf98990b62d8fed923b876218570e1 100644
--- a/chromeos/printing/ppd_cache.cc
+++ b/chromeos/printing/ppd_cache.cc
@@ -68,6 +68,7 @@ class PpdCacheImpl : public PpdCache {
   base::Optional<base::FilePath> Store(
       const Printer::PpdReference& reference,
       const std::string& ppd_contents) override {
+    VLOG(1) << "Storing ppd";

[Carlson, 2016/12/01 01:58:44]

Reminder to remove this logging.

[skau, 2016/12/01 21:45:12]

Done.

     base::ThreadRestrictions::AssertIOAllowed();
     if (!EnsureCacheDirectoryExists()) {
       return base::nullopt;
@@ -76,11 +77,13 @@ class PpdCacheImpl : public PpdCache {
     base::FilePath contents_path =
         GetCachePathBase(reference).AddExtension(".ppd");
     if (IsGZipped(ppd_contents)) {
+      VLOG(1) << "PPD is gzipped";
       contents_path = contents_path.AddExtension(".gz");
     }
     if (base::WriteFile(contents_path, ppd_contents.data(),
                         ppd_contents.size()) ==
         static_cast<int>(ppd_contents.size())) {
+      VLOG(1) << "Stored at path: " << contents_path.value();
       ret = contents_path;
     } else {
       LOG(ERROR) << "Failed to write " << contents_path.LossyDisplayName();