Revert of Fix downloading LLVM Gold plugin in the case, when Clang is up to date.

tools/clang/scripts/update.py

Index: tools/clang/scripts/update.py
diff --git a/tools/clang/scripts/update.py b/tools/clang/scripts/update.py
index 4bf1bab35f3bf899ffeb0f2c2b7dfdc500997573..aca7cb9a79c0d0e791cf2a6a835f081977488720 100755
--- a/tools/clang/scripts/update.py
+++ b/tools/clang/scripts/update.py
@@ -301,17 +301,9 @@
 
 def UpdateClang(args):
   print 'Updating Clang to %s...' % PACKAGE_VERSION
-
-  need_gold_plugin = 'LLVM_DOWNLOAD_GOLD_PLUGIN' in os.environ or (
-      sys.platform.startswith('linux') and
-      'buildtype=Official' in os.environ.get('GYP_DEFINES', '') and
-      'branding=Chrome' in os.environ.get('GYP_DEFINES', ''))
-
   if ReadStampFile() == PACKAGE_VERSION:
-    print 'Clang is already up to date.'
-    if not need_gold_plugin or os.path.exists(
-        os.path.join(LLVM_BUILD_DIR, "lib/LLVMgold.so")):
-      return 0
+    print 'Already up to date.'
+    return 0
 
   # Reset the stamp file in case the build is unsuccessful.
   WriteStampFile('')
@@ -339,7 +331,10 @@
       # Download the gold plugin if requested to by an environment variable.
       # This is used by the CFI ClusterFuzz bot, and it's required for official
       # builds on linux.
-      if need_gold_plugin:
+      if 'LLVM_DOWNLOAD_GOLD_PLUGIN' in os.environ or (
+          sys.platform.startswith('linux') and
+          'buildtype=Official' in os.environ.get('GYP_DEFINES', '') and
+          'branding=Chrome' in os.environ.get('GYP_DEFINES', '')):
         RunCommand(['python', CHROMIUM_DIR+'/build/download_gold_plugin.py'])
       WriteStampFile(PACKAGE_VERSION)
       return 0