Add support for create_installer_archive.py to generate a depfile

chrome/installer/mini_installer.gyp

 {
   'variables': {
     'version_py': '<(DEPTH)/build/util/version.py',
     'version_path': '../../chrome/VERSION',
     'lastchange_path': '<(DEPTH)/build/util/LASTCHANGE',
     # 'branding_dir' is set in the 'conditions' section at the bottom.
     'msvs_use_common_release': 0,
     'msvs_use_common_linker_extras': 0,
     'mini_installer_internal_deps%': 0,
     'mini_installer_official_deps%': 0,
@@ skipping 174 matching lines @@
                 }],
                 ['component == "shared_library"', {
                   'variables': {
                     'component_build_flag': '--component_build=1',
                   },
                 }, {
                   'variables': {
                     'component_build_flag': '',
                   },
                   'outputs': [
-                    '<(PRODUCT_DIR)/<(RULE_INPUT_NAME).packed.7z',

[scottmg, 2015/01/29 23:32:41]

this expanded to "chrome.release.packed.7z" which was never generated, i assume
accidentally.

+                    '<(PRODUCT_DIR)/chrome.packed.7z',
                   ],
                 }],
                 ['disable_nacl==1', {
                   'inputs!': [
                     '<(PRODUCT_DIR)/nacl64.exe',
                     '<(PRODUCT_DIR)/nacl_irt_x86_32.nexe',
                     '<(PRODUCT_DIR)/nacl_irt_x86_64.nexe',
                   ],
                 }],
                 ['target_arch=="x64"', {
@@ skipping 30 matching lines @@
                 '<(PRODUCT_DIR)/chrome.exe',
                 '<(PRODUCT_DIR)/chrome.dll',
                 '<(PRODUCT_DIR)/nacl64.exe',
                 '<(PRODUCT_DIR)/nacl_irt_x86_32.nexe',
                 '<(PRODUCT_DIR)/nacl_irt_x86_64.nexe',
                 '<(PRODUCT_DIR)/locales/en-US.pak',
               ],
               'outputs': [
                 # Also note that chrome.packed.7z is defined as an output in a
                 # conditional above.
-                'xxx2.out',

[scottmg, 2015/01/29 23:32:41]

this was to force an always-build which we're trying to avoid

-                '<(PRODUCT_DIR)/<(RULE_INPUT_NAME).7z',

[scottmg, 2015/01/29 23:32:41]

same as .packed.7z above

+                '<(PRODUCT_DIR)/chrome.7z',
                 '<(PRODUCT_DIR)/setup.ex_',
                 '<(INTERMEDIATE_DIR)/packed_files.rc',
               ],
+              'depfile': [
+                '<(INTERMEDIATE_DIR)/installer_archive.d',

[scottmg, 2015/01/29 23:32:41]

this doesn't work yet (gyp only supports it on actions, not rules)

+              ],
               'action': [
                 'python',
                 '<(create_installer_archive_py_path)',
                 '--build_dir', '<(PRODUCT_DIR)',
                 '--staging_dir', '<(INTERMEDIATE_DIR)',
                 '--input_file', '<(RULE_INPUT_PATH)',
                 '--resource_file_path', '<(INTERMEDIATE_DIR)/packed_files.rc',
+                '--depfile', '<(INTERMEDIATE_DIR)/installer_archive.d',
                 '<(enable_hidpi_flag)',
                 '<(component_build_flag)',
                 '<(target_arch_flag)',
                 # TODO(sgk):  may just use environment variables
                 #'--distribution=$(CHROMIUM_BUILD)',
                 '--distribution=_google_chrome',
                 # Optional arguments to generate diff installer
                 #'--last_chrome_installer=C:/Temp/base',
                 #'--setup_exe_format=DIFF',
                 #'--diff_algorithm=COURGETTE',
@@ skipping 45 matching lines @@
       'variables': {
          'branding_dir': '../app/theme/google_chrome',
       },
     }, { # else branding!="Chrome"
       'variables': {
          'branding_dir': '../app/theme/chromium',
       },
     }],
   ],
 }