Replace FilePath with base::FilePath in some more top level directories.

printing/backend/print_backend_cups.cc

Index: printing/backend/print_backend_cups.cc
diff --git a/printing/backend/print_backend_cups.cc b/printing/backend/print_backend_cups.cc
index c2f236b5e891949a08c36eb535314fa6765a1f68..bd51130c1df321bcc3cd9609707984cf1001a2da 100644
--- a/printing/backend/print_backend_cups.cc
+++ b/printing/backend/print_backend_cups.cc
@@ -128,7 +128,7 @@ class PrintBackendCUPS : public PrintBackend {
   // version in another case. There is an issue specifing CUPS_HTTP_DEFAULT
   // in the <functions>2(), it does not work in CUPS prior to 1.4.
   int GetDests(cups_dest_t** dests);
-  FilePath GetPPD(const char* name);
+  base::FilePath GetPPD(const char* name);
 
   GURL print_server_url_;
   http_encryption_t cups_encryption_;
@@ -235,7 +235,7 @@ bool PrintBackendCUPS::GetPrinterCapsAndDefaults(
   VLOG(1) << "CUPS: Getting caps and defaults"
           << ", printer name: " << printer_name;
 
-  FilePath ppd_path(GetPPD(printer_name.c_str()));
+  base::FilePath ppd_path(GetPPD(printer_name.c_str()));
   // In some cases CUPS failed to get ppd file.
   if (ppd_path.empty()) {
     LOG(ERROR) << "CUPS: Failed to get PPD"
@@ -332,12 +332,12 @@ FilePath PrintBackendCUPS::GetPPD(const char* name) {
   // Protect this code with lock.
   CR_DEFINE_STATIC_LOCAL(base::Lock, ppd_lock, ());
   base::AutoLock ppd_autolock(ppd_lock);
-  FilePath ppd_path;
+  base::FilePath ppd_path;
   const char* ppd_file_path = NULL;
   if (print_server_url_.is_empty()) {  // Use default (local) print server.
     ppd_file_path = cupsGetPPD(name);
     if (ppd_file_path)
-      ppd_path = FilePath(ppd_file_path);
+      ppd_path = base::FilePath(ppd_file_path);
   } else {
     // cupsGetPPD2 gets stuck sometimes in an infinite time due to network
     // configuration/issues. To prevent that, use non-blocking http connection
@@ -360,7 +360,7 @@ FilePath PrintBackendCUPS::GetPPD(const char* name) {
       // Comparing file size against that content length might be unreliable
       // since some http reponses are encoded and content_length > file size.
       // Let's just check for the obvious CUPS and http errors here.
-      ppd_path = FilePath(ppd_file_path);
+      ppd_path = base::FilePath(ppd_file_path);
       ipp_status_t error_code = cupsLastError();
       int http_error = httpError(http.http());
       if (error_code > IPP_OK_EVENTS_COMPLETE || http_error != 0) {