Do not compress chrome.7z into chrome.packed.7z for developer (component) builds.

chrome/installer/mini_installer.gyp

Index: chrome/installer/mini_installer.gyp
diff --git a/chrome/installer/mini_installer.gyp b/chrome/installer/mini_installer.gyp
index 9256ecac0681cfb14e4d17cda739cbef39bd9064..5ad4d40f929784fb8f1a47e12e3f4b9359232e55 100644
--- a/chrome/installer/mini_installer.gyp
+++ b/chrome/installer/mini_installer.gyp
@@ -8,6 +8,7 @@
     'msvs_use_common_linker_extras': 0,
     'mini_installer_internal_deps%': 0,
     'mini_installer_official_deps%': 0,
+    'skip_compress_archive%': 0,
   },
   'includes': [
     '../../build/win_precompile.gypi',
@@ -224,6 +225,15 @@
                     'component_build_flag': '',
                   },
                 }],
+                ['skip_compress_archive == 1', {
+                  'variables': {
+                    'skip_compress_archive_flag': '--skip_compress_archive=1',
+                  },
+                }, {
+                  'variables': {
+                    'skip_compress_archive_flag': '',
+                  },
+                }],
                 ['disable_nacl==1', {
                   'inputs!': [
                     '<(PRODUCT_DIR)/nacl64.exe',
@@ -262,6 +272,7 @@
                 '<(enable_hidpi_flag)',
                 '<(enable_touch_ui_flag)',
                 '<(component_build_flag)',
+                '<(skip_compress_archive_flag)',
                 # TODO(sgk):  may just use environment variables
                 #'--distribution=$(CHROMIUM_BUILD)',
                 '--distribution=_google_chrome',