Differential updates for components.

chrome/installer/setup/setup_main.cc

Index: chrome/installer/setup/setup_main.cc
===================================================================
--- chrome/installer/setup/setup_main.cc	(revision 201835)
+++ chrome/installer/setup/setup_main.cc	(working copy)
@@ -14,6 +14,7 @@
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/file_version_info.h"
+#include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
@@ -491,7 +492,6 @@
                                InstallerState* installer_state,
                                installer::InstallStatus* status) {
   if (installer_state->FindProduct(BrowserDistribution::CHROME_APP_HOST)) {
-
     if (!installer_state->is_multi_install()) {
       LOG(DFATAL) << "App Launcher requires multi install";
       *status = installer::APP_HOST_REQUIRES_MULTI_INSTALL;
@@ -507,7 +507,6 @@
       installer_state->WriteInstallerResult(*status, 0, NULL);
       return false;
     }
-
   }
 
   return true;
@@ -1472,8 +1471,27 @@
   } else if (cmd_line.HasSwitch(installer::switches::kChromeFrameQuickEnable)) {
     *exit_code = installer::ChromeFrameQuickEnable(original_state,
                                                    installer_state);
-  } else {
-    handled = false;
+  } else if (cmd_line.HasSwitch(installer::switches::kPatch)) {
+    const std::string patch_type_str(
+        cmd_line.GetSwitchValueASCII(installer::switches::kPatch));
+    const base::FilePath input_file(
+        cmd_line.GetSwitchValuePath(installer::switches::kInputFile));
+    const base::FilePath patch_file(
+        cmd_line.GetSwitchValuePath(installer::switches::kPatchFile));
+    const base::FilePath output_file(
+        cmd_line.GetSwitchValuePath(installer::switches::kOutputFile));
+
+    if (patch_type_str == installer::switches::kCourgette) {
+      *exit_code = installer::CourgettePatchFiles(input_file,
+                                                  patch_file,
+                                                  output_file);
+    } else if (patch_type_str == installer::switches::kBsdiff) {
+      *exit_code = installer::BsdiffPatchFiles(input_file,
+                                               patch_file,
+                                               output_file);
+    } else {
+      *exit_code = installer::PATCH_INVALID_ARGUMENTS;
+    }
   }
 
   return handled;