Make FileSystemContext respect StoragePartitions. filesystem:// urls will be properly isolated

chrome/browser/chromeos/extensions/file_browser_handler_api.cc

Index: chrome/browser/chromeos/extensions/file_browser_handler_api.cc
diff --git a/chrome/browser/chromeos/extensions/file_browser_handler_api.cc b/chrome/browser/chromeos/extensions/file_browser_handler_api.cc
index 9d6b92c35e5bde231a9e3f3201427e6e53b54491..9814bb61595d5c34b24831d27fc86d4e17a18c46 100644
--- a/chrome/browser/chromeos/extensions/file_browser_handler_api.cc
+++ b/chrome/browser/chromeos/extensions/file_browser_handler_api.cc
@@ -54,6 +54,7 @@
 #include "content/public/browser/child_process_security_policy.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
+#include "content/public/browser/storage_partition.h"
 #include "googleurl/src/gurl.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_mount_point_provider.h"
@@ -335,11 +336,13 @@ void FileHandlerSelectFileFunction::OnFilePathSelected(
 
   // We have to open file system in order to create a FileEntry object for the
   // selected file path.
-  BrowserContext::GetFileSystemContext(profile_)->OpenFileSystem(
-      source_url_.GetOrigin(), fileapi::kFileSystemTypeExternal, false,
-      base::Bind(&RunOpenFileSystemCallback,
-          base::Bind(&FileHandlerSelectFileFunction::OnFileSystemOpened,
-                     this)));
+  BrowserContext::GetDefaultStoragePartition(profile_)->
+      GetFileSystemContext()->OpenFileSystem(
+          source_url_.GetOrigin(), fileapi::kFileSystemTypeExternal, false,
+          base::Bind(
+              &RunOpenFileSystemCallback,
+              base::Bind(&FileHandlerSelectFileFunction::OnFileSystemOpened,
+                         this)));
 };
 
 void FileHandlerSelectFileFunction::OnFileSystemOpened(
@@ -362,7 +365,8 @@ void FileHandlerSelectFileFunction::OnFileSystemOpened(
 
 void FileHandlerSelectFileFunction::GrantPermissions() {
   fileapi::ExternalFileSystemMountPointProvider* external_provider =
-      BrowserContext::GetFileSystemContext(profile_)->external_provider();
+      BrowserContext::GetDefaultStoragePartition(profile_)->
+      GetFileSystemContext()->external_provider();
   DCHECK(external_provider);
 
   external_provider->GetVirtualPath(full_path_, &virtual_path_);