Revert "third_party/protobuf: Update to HEAD (83d681ee2c)"

components/policy/BUILD.gn

Index: components/policy/BUILD.gn
diff --git a/components/policy/BUILD.gn b/components/policy/BUILD.gn
index 696c816333e16542ca3c660f8ce4dc6437e3a358..bf7ceca0df574078cdf66dadacc47c33013ecf53 100644
--- a/components/policy/BUILD.gn
+++ b/components/policy/BUILD.gn
@@ -192,10 +192,7 @@ component("cloud_policy_proto_generated_compile") {
   ]
 }
 proto_library("cloud_policy_proto_generated_compile_proto") {
-  visibility = [
-    ":cloud_policy_proto_generated_compile",
-    ":chrome_settings_proto_generated_compile",
-  ]
+  visibility = [ ":cloud_policy_proto_generated_compile" ]
   sources = [
     cloud_policy_proto_path,
   ]
@@ -212,28 +209,16 @@ proto_library("cloud_policy_proto_generated_compile_proto") {
 }
 
 # This target builds the "full" protobuf, used for tests only.
-component("chrome_settings_proto_generated_compile") {
-  testonly = true
-  public_deps = [
-    ":chrome_settings_proto_generated_compile_proto",
-    ":cloud_policy_proto_generated_compile_proto",
-  ]
-}
-proto_library("chrome_settings_proto_generated_compile_proto") {
+proto_library("chrome_settings_proto") {
   testonly = true
-  visibility = [ ":chrome_settings_proto_generated_compile" ]
   sources = [
     chrome_settings_proto_path,
   ]
-
   proto_out_dir = "components/policy/proto"
-  cc_generator_options = "dllexport_decl=POLICY_PROTO_EXPORT:"
-  cc_include = "components/policy/proto/policy_proto_export.h"
-  component_build_force_source_set = true
-  defines = [ "POLICY_PROTO_COMPILATION" ]
 
   deps = [
     ":cloud_policy_code_generate",
+    ":cloud_policy_proto_generated_compile",
   ]
 }