shell dialogs: Move the linux implementations.

ui/base/strings/ui_strings.grd

Index: ui/base/strings/ui_strings.grd
diff --git a/ui/base/strings/ui_strings.grd b/ui/base/strings/ui_strings.grd
index f0e6f6cb20a7021479f99dcde449f7818643d658..2dea10bb4ace115c38395291704344a00a62f61a 100644
--- a/ui/base/strings/ui_strings.grd
+++ b/ui/base/strings/ui_strings.grd
@@ -200,6 +200,23 @@ need to be translated for each locale.-->
         </message>
       </if>
 
+      <!-- File chooser dialog default titles (only used on Linux) -->
+      <message name="IDS_SELECT_FOLDER_DIALOG_TITLE" desc="The default title for the Select Folder file chooser dialog.">
+        Select Folder
+      </message>
+      <message name="IDS_SAVE_AS_DIALOG_TITLE" desc="The default title for the Save As file chooser dialog.">
+        Save File
+      </message>
+      <message name="IDS_OPEN_FILE_DIALOG_TITLE" desc="The default title for the Open File file chooser dialog (single file).">
+        Open File
+      </message>
+      <message name="IDS_OPEN_FILES_DIALOG_TITLE" desc="The default title for the Open File file chooser dialog (multiple files).">
+        Open Files
+      </message>
+      <message name="IDS_SAVEAS_ALL_FILES" desc="Save As dialog box default text">
+        All Files
+      </message>
+
       <!--Accessible name/action strings-->
       <message name="IDS_APP_ACCACTION_PRESS" desc="The accessible default action for a button.">
         Press