[fsp] Wire limiting number of opened files to FSP API.

chrome/common/extensions/api/file_system_provider.idl

Index: chrome/common/extensions/api/file_system_provider.idl
diff --git a/chrome/common/extensions/api/file_system_provider.idl b/chrome/common/extensions/api/file_system_provider.idl
index 2d1187ff016c1cfde3b531c27fd4b0ed43f7e9db..6f17401019dd3f7cb0e917cf5513806b317173c7 100644
--- a/chrome/common/extensions/api/file_system_provider.idl
+++ b/chrome/common/extensions/api/file_system_provider.idl
@@ -110,6 +110,10 @@ namespace fileSystemProvider {
     // of the file system (such as creating, deleting or writing to files).
     boolean? writable;
 
+    // Maximum number of opened files at once. If not specified, then not
+    // limited.
+    long? openedFilesLimit;
+
     // Whether the file system supports the <code>tag</code> field for observed
     // directories. Required in order to enable the internal cache.
     [nodoc] boolean? supportsNotifyTag;
@@ -503,7 +507,8 @@ namespace fileSystemProvider {
         ProviderErrorCallback errorCallback);
 
     // Raised when opening a file at <code>filePath</code> is requested. If the
-    // file does not exist, then the operation must fail.
+    // file does not exist, then the operation must fail. Maximum number of

[benwells, 2015/01/09 06:51:29]

Nit: "The maximum number of files that can be opened at once can ...."

[mtomasz, 2015/01/09 06:57:55]

Done.

+    // files opened at once can be specified with <code>MountOptions</code>.
     [maxListeners=1] static void onOpenFileRequested(
         OpenFileRequestedOptions options,
         ProviderSuccessCallback successCallback,