Change PPDCache to use a path inside the per-user profile.

chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc

Index: chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc
diff --git a/chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc b/chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc
index 7fa0ec816499ca64023b59d09c73501a845ba260..748e3e7c176fc7d726bd06b538d80287c7ddabe9 100644
--- a/chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc
+++ b/chrome/browser/ui/webui/settings/chromeos/cups_printers_handler.cc
@@ -8,6 +8,7 @@
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
+#include "base/files/file_util.h"
 #include "base/memory/ptr_util.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
@@ -79,9 +80,12 @@ CupsPrintersHandler::CupsPrintersHandler(content::WebUI* webui)
     : printer_discoverer_(nullptr),
       profile_(Profile::FromWebUI(webui)),
       weak_factory_(this) {
-  base::FilePath ppd_cache_path;
-  CHECK(
-      base::PathService::Get(chrome::DIR_CHROMEOS_PPD_CACHE, &ppd_cache_path));
+  base::FilePath ppd_cache_path = profile_->GetPath().Append("PPDCache");

[sky, 2016/11/15 22:18:37]

I think you need FILE_PATH_LITERAL here, or AppendASCII, although maybe not as
this code is chromeos only.

[Carlson, 2016/11/15 22:25:12]

It is chromeos-specific, but no harm in being orthogonal, so done.

+  if (!base::PathExists(ppd_cache_path) &&
+      !base::CreateDirectory(ppd_cache_path)) {
+    LOG(ERROR) << "Failed to create ppd cache directory "
+               << ppd_cache_path.MaybeAsASCII();
+  }
   ppd_provider_ = chromeos::printing::PpdProvider::Create(
       google_apis::GetAPIKey(), g_browser_process->system_request_context(),
       content::BrowserThread::GetTaskRunnerForThread(