Support file system access in DevTools with isolated file system.

chrome/browser/devtools/devtools_file_helper.h

Index: chrome/browser/devtools/devtools_file_helper.h
diff --git a/chrome/browser/devtools/devtools_file_helper.h b/chrome/browser/devtools/devtools_file_helper.h
index b894a73c0953bba782f4453f7c3564140e4d8e61..42fcb7d46a6c4eeee15092a5f384a7f3ee1b018b 100644
--- a/chrome/browser/devtools/devtools_file_helper.h
+++ b/chrome/browser/devtools/devtools_file_helper.h
@@ -7,6 +7,7 @@
 
 #include <map>
 #include <string>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
@@ -16,13 +17,34 @@
 class FilePath;
 class Profile;
 
+namespace content {
+class WebContents;
+}
+
 class DevToolsFileHelper {
  public:
-  explicit DevToolsFileHelper(Profile* profile);
+  struct FileSystem {
+    FileSystem();
+    FileSystem(const std::string& file_system_name,
+               const std::string& root_url,
+               const std::string& file_system_path);
+
+    std::string file_system_name;
+    std::string root_url;
+    std::string file_system_path;
+  };
+
+  DevToolsFileHelper(content::WebContents* web_contents, Profile* profile);
   ~DevToolsFileHelper();
 
   typedef base::Callback<void(void)> SaveCallback;
   typedef base::Callback<void(void)> AppendCallback;
+  typedef base::Callback<
+      void(const std::vector<DevToolsFileHelper::FileSystem>&)>
+      RequestFileSystemsCallback;
+  typedef base::Callback<
+      void(std::string, const DevToolsFileHelper::FileSystem&)>
+      AddFileSystemCallback;
 
   // Saves |content| to the file and associates its path with given |url|.
   // If client is calling this method with given |url| for the first time
@@ -40,13 +62,38 @@ class DevToolsFileHelper {
               const std::string& content,
               const AppendCallback& callback);
 
+  // Shows select folder dialog.
+  // If user cancels folder selection, passes empty FileSystem struct to
+  // |callback|.
+  // If selected folder contains magic file, grants renderer read/write
+  // permissions, registers isolated file system for it and passes FileSystem
+  // struct to |callback|. Saves file system path to prefs.
+  // If selected folder does not contain magic file, passes error string to
+  // |callback|.
+  void AddFileSystem(const AddFileSystemCallback& callback);
+
+  // Loads file system paths from prefs, grants permissions and registers
+  // isolated file system for those of them that contain magic file and passes
+  // FileSystem structs for registered file systems to |callback|.
+  void RequestFileSystems(const RequestFileSystemsCallback& callback);
+
+  // Removes isolated file system for given |file_system_path|.
+  void RemoveFileSystem(const std::string& file_system_path);
+
  private:
   void SaveAsFileSelected(const std::string& url,
-                    const std::string& content,
-                    const SaveCallback& callback,
-                    const FilePath& path);
+                          const std::string& content,
+                          const SaveCallback& callback,
+                          const FilePath& path);
   void SaveAsFileSelectionCanceled();
+  void InnerAddFileSystem(const AddFileSystemCallback& callback,
+                          const FilePath& path);
+  void AddValidatedFileSystem(const AddFileSystemCallback& callback,
+                              const std::vector<FilePath>& permitted_paths);
+  void RestoreValidatedFileSystems(const RequestFileSystemsCallback& callback,
+                                   const std::vector<FilePath>& file_paths);
 
+  content::WebContents* web_contents_;
   Profile* profile_;
   base::WeakPtrFactory<DevToolsFileHelper> weak_factory_;
   typedef std::map<std::string, FilePath> PathsMap;