Update gyp files and DEPS for icu42

chrome/installer/installer.gyp

 {
   'variables': {
     'version_py': '../../chrome/tools/build/version.py',
     'version_path': '../../chrome/VERSION',
     'lastchange_path': '<(SHARED_INTERMEDIATE_DIR)/build/LASTCHANGE',
     # 'branding_dir' is set in the 'conditions' section at the bottom.
   },
   'includes': [
     '../../build/common.gypi',
   ],
   'conditions': [
     ['OS=="win"', {
       'targets': [
         {
           'target_name': 'installer_util',
           'type': '<(library)',
           'msvs_guid': 'EFBB1436-A63F-4CD8-9E99-B89226E782EC',
           'dependencies': [
             '../../app/app.gyp:app_id',
             'installer_util_strings',
             '../chrome.gyp:common',
             '../chrome.gyp:chrome_resources',
             '../chrome.gyp:chrome_strings',
             '../../courgette/courgette.gyp:courgette_lib',
             '../../third_party/bspatch/bspatch.gyp:bspatch',
-            '../../third_party/icu38/icu38.gyp:icui18n',
-            '../../third_party/icu38/icu38.gyp:icuuc',
+            '../../third_party/icu/icu.gyp:icui18n',
+            '../../third_party/icu/icu.gyp:icuuc',
             '../../third_party/libxml/libxml.gyp:libxml',
             '../../third_party/lzma_sdk/lzma_sdk.gyp:lzma_sdk',
           ],
           'include_dirs': [
             '../..',
           ],
           'sources': [
             'util/browser_distribution.cc',
             'util/browser_distribution.h',
             'util/compat_checks.cc',
@@ skipping 588 matching lines @@
       'variables': {
          'branding_dir': '../app/theme/google_chrome',
       },
     }, { # else branding!="Chrome"
       'variables': {
          'branding_dir': '../app/theme/chromium',
       },
     }],
   ],
 }