Make ZIP archiver a component extension.

chrome/browser/extensions/component_loader.cc

Index: chrome/browser/extensions/component_loader.cc
diff --git a/chrome/browser/extensions/component_loader.cc b/chrome/browser/extensions/component_loader.cc
index c5787c367ff6e6934c32023c1a31ba86835ec6fd..9d3836418794aac05b862695f63cf810ac996793 100644
--- a/chrome/browser/extensions/component_loader.cc
+++ b/chrome/browser/extensions/component_loader.cc
@@ -317,6 +317,13 @@ void ComponentLoader::AddGalleryExtension() {
 #endif
 }
 
+void ComponentLoader::AddZipArchiverExtension() {
+#if defined(OS_CHROMEOS)
+  Add(IDR_ZIP_ARCHIVER_MANIFEST,
+      base::FilePath(FILE_PATH_LITERAL("zip_archiver")));
+#endif  // defined(OS_CHROMEOS)
+}
+
 void ComponentLoader::AddWebstoreWidgetExtension() {
 #if defined(OS_CHROMEOS)
   AddWithNameAndDescription(
@@ -555,6 +562,13 @@ void ComponentLoader::AddDefaultComponentExtensionsWithBackgroundPages(
     AddGalleryExtension();
     AddWebstoreWidgetExtension();
 
+#if defined(OS_CHROMEOS)

[benwells, 2017/04/14 05:12:32]

why do you need the flag here and in the body of AddZipArchiverExtension?

The pattern to these commands is to check conditional things in the body of the
function, so you should just call AddZipArchiverExtension here, and check the
build and command line in the body.

+    if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          chromeos::switches::kEnableZipArchiverOnFileManager)) {
+      AddZipArchiverExtension();
+    }
+#endif
+
     AddHangoutServicesExtension();
     AddHotwordAudioVerificationApp();
     AddHotwordHelperExtension();