Add FILE_DIALOG_OPEN_FOLDER to CefBrowser.runFileDialog (fixes chromiumembedded#498)

Author: smilefx

java/org/cef/handler/CefDialogHandler.java

@@ -20,6 +20,7 @@ public interface CefDialogHandler {
     enum FileDialogMode {
         FILE_DIALOG_OPEN, //!< Requires that the file exists before allowing the user to pick it.
         FILE_DIALOG_OPEN_MULTIPLE, //!< Like Open, but allows picking multiple files to open.
+        FILE_DIALOG_OPEN_FOLDER, //!< Like Open, but selects a folder to open.
         FILE_DIALOG_SAVE //!< Allows picking a nonexistent file, and prompts to overwrite if the
                          //! file already exists.
     }

native/CefBrowser_N.cpp

@@ -1580,6 +1580,10 @@ Java_org_cef_browser_CefBrowser_1N_N_1RunFileDialog(JNIEnv* env,
                             "org/cef/handler/CefDialogHandler$FileDialogMode",
                             "FILE_DIALOG_OPEN_MULTIPLE")) {
     mode = FILE_DIALOG_OPEN_MULTIPLE;
+  } else if (IsJNIEnumValue(env, jmode,
+                            "org/cef/handler/CefDialogHandler$FileDialogMode",
+                            "FILE_DIALOG_OPEN_FOLDER")) {
+    mode = FILE_DIALOG_OPEN_FOLDER;
   } else if (IsJNIEnumValue(env, jmode,
                             "org/cef/handler/CefDialogHandler$FileDialogMode",
                             "FILE_DIALOG_SAVE")) {

native/dialog_handler.cpp

@@ -58,6 +58,8 @@ bool DialogHandler::OnFileDialog(
                FILE_DIALOG_OPEN, jmode);
       JNI_CASE(env, "org/cef/handler/CefDialogHandler$FileDialogMode",
                FILE_DIALOG_OPEN_MULTIPLE, jmode);
+      JNI_CASE(env, "org/cef/handler/CefDialogHandler$FileDialogMode",
+               FILE_DIALOG_OPEN_FOLDER, jmode);
       JNI_CASE(env, "org/cef/handler/CefDialogHandler$FileDialogMode",
                FILE_DIALOG_SAVE, jmode);
   }