AU: Update Downloader to support our image formats.

src/platform/update_engine/filesystem_copier_action.h

Index: src/platform/update_engine/filesystem_copier_action.h
diff --git a/src/platform/update_engine/filesystem_copier_action.h b/src/platform/update_engine/filesystem_copier_action.h
index 9e7f0606796edad379f2c0faf5a6540361a1dfc9..786c2ab083c3653c928e7685463cc6262343c7b6 100644
--- a/src/platform/update_engine/filesystem_copier_action.h
+++ b/src/platform/update_engine/filesystem_copier_action.h
@@ -32,8 +32,9 @@ class ActionTraits<FilesystemCopierAction> {
 
 class FilesystemCopierAction : public Action<FilesystemCopierAction> {
  public:
-  FilesystemCopierAction()
-      : src_stream_(NULL),
+  explicit FilesystemCopierAction(bool copying_kernel_install_path)
+      : copying_kernel_install_path_(copying_kernel_install_path),
+        src_stream_(NULL),
         dst_stream_(NULL),
         canceller_(NULL),
         read_in_flight_(false),
@@ -69,6 +70,10 @@ class FilesystemCopierAction : public Action<FilesystemCopierAction> {
   // was_cancelled should be true if TerminateProcessing() was called.
   void Cleanup(bool success, bool was_cancelled);
   
+  // If true, this action is copying to the kernel_install_path from
+  // the install plan, otherwise it's copying just to the install_path.
+  const bool copying_kernel_install_path_;
+  
   // The path to copy from. If empty (the default), the source is from the
   // passed in InstallPlan.
   std::string copy_source_;