gdata: Fix "save as pdf" to work on Google Drive.

chrome/browser/chromeos/gdata/gdata_util.cc

Index: chrome/browser/chromeos/gdata/gdata_util.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_util.cc b/chrome/browser/chromeos/gdata/gdata_util.cc
index fe764c9ea56c16d80185a3bde161038ae20ee606..52af3978bcece5f1aa8fd944b8ff7a523a156d70 100644
--- a/chrome/browser/chromeos/gdata/gdata_util.cc
+++ b/chrome/browser/chromeos/gdata/gdata_util.cc
@@ -23,6 +23,7 @@
 #include "base/time.h"
 #include "chrome/browser/chromeos/gdata/gdata.pb.h"
 #include "chrome/browser/chromeos/gdata/gdata_file_system_interface.h"
+#include "chrome/browser/chromeos/gdata/gdata_file_write_helper.h"
 #include "chrome/browser/chromeos/gdata/gdata_system_service.h"
 #include "chrome/browser/chromeos/login/user.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
@@ -71,6 +72,12 @@ GDataCache* GetGDataCache(Profile* profile) {
   return system_service ? system_service->cache() : NULL;
 }
 
+GDataFileWriteHelper* GetGDataFileWriteHelper(Profile* profile) {
+  GDataSystemService* system_service =
+      GDataSystemServiceFactory::GetForProfile(profile);
+  return system_service ? system_service->file_write_helper() : NULL;
+}
+
 void GetHostedDocumentURLBlockingThread(const FilePath& gdata_cache_path,
                                         GURL* url) {
   std::string json;
@@ -579,5 +586,22 @@ std::string FormatTimeAsString(const base::Time& time) {
       exploded.hour, exploded.minute, exploded.second, exploded.millisecond);
 }
 
+void PrepareWritableFileAndRun(Profile* profile,
+                               const FilePath& path,
+                               const OpenFileCallback& callback) {
+  if (IsUnderGDataMountPoint(path)) {
+    GDataFileWriteHelper* file_write_helper = GetGDataFileWriteHelper(profile);
+    if (!file_write_helper)
+      return;
+    FilePath remote_path(ExtractGDataPath(path));
+    file_write_helper->PrepareWritableFileAndRun(remote_path, callback);
+  } else {
+    if (!callback.is_null()) {
+      content::BrowserThread::GetBlockingPool()->PostTask(
+          FROM_HERE, base::Bind(callback, GDATA_FILE_OK, path));
+    }
+  }
+}
+
 }  // namespace util
 }  // namespace gdata