Grant file access permissions for cached file paths to file browsers/handlers.

chrome/browser/chromeos/gdata/gdata_file_system.h

Index: chrome/browser/chromeos/gdata/gdata_file_system.h
diff --git a/chrome/browser/chromeos/gdata/gdata_file_system.h b/chrome/browser/chromeos/gdata/gdata_file_system.h
index fa86bcec221efffe4bbc3993fd014c2ddff32e48..c4214cfbdc8f8a15e9cea811d12adaff9f84a1ab 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system.h
+++ b/chrome/browser/chromeos/gdata/gdata_file_system.h
@@ -317,6 +317,17 @@ class GDataFileSystemInterface {
   // <user_profile_dir>/GCache/v1/pinned
   virtual FilePath GetGDataCachePinnedDirectory() const = 0;
 
+  // Returns the pinned sub-directory under gdata cache directory, i.e.
+  // <user_profile_dir>/GCache/v1/pinned
+  virtual FilePath GetGDataCachePersistentDirectory() const = 0;
+
+  // Returns absolute path of the file if it were cached or to be cached.
+  virtual FilePath GetCacheFilePath(
+      const std::string& resource_id,
+      const std::string& md5,
+      GDataRootDirectory::CacheSubDirectoryType sub_dir_type,
+      CachedFileOrigin file_orign) const = 0;
+
   // Fetches the user's Account Metadata to find out current quota information
   // and returns it to the callback.
   virtual void GetAvailableSpace(const GetAvailableSpaceCallback& callback) = 0;
@@ -380,6 +391,12 @@ class GDataFileSystem : public GDataFileSystemInterface {
   virtual FilePath GetGDataCacheTmpDirectory() const OVERRIDE;
   virtual FilePath GetGDataTempDownloadFolderPath() const OVERRIDE;
   virtual FilePath GetGDataCachePinnedDirectory() const OVERRIDE;
+  virtual FilePath GetGDataCachePersistentDirectory() const OVERRIDE;
+  virtual FilePath GetCacheFilePath(
+      const std::string& resource_id,
+      const std::string& md5,
+      GDataRootDirectory::CacheSubDirectoryType sub_dir_type,
+      CachedFileOrigin file_orign) const OVERRIDE;
   virtual void GetAvailableSpace(
       const GetAvailableSpaceCallback& callback) OVERRIDE;
   virtual void AddDownloadedFile(const FilePath& virtual_dir_path,
@@ -749,13 +766,6 @@ class GDataFileSystem : public GDataFileSystemInterface {
   // - uploads dirty files to gdata server.
   // - etc.
 
-  // Returns absolute path of the file if it were cached or to be cached.
-  FilePath GetCacheFilePath(
-      const std::string& resource_id,
-      const std::string& md5,
-      GDataRootDirectory::CacheSubDirectoryType sub_dir_type,
-      CachedFileOrigin file_orign);
-
   // Checks if file corresponding to |resource_id| and |md5| exists in cache.
   // Initializes cache if it has not been initialized.
   // Upon completion, |callback| is invoked on the thread where this method was