Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/.gitignore

Index: third_party/protobuf/.gitignore
diff --git a/third_party/protobuf/.gitignore b/third_party/protobuf/.gitignore
index 8b42cacbbdd1e8c798236981ef06fae604f776be..27eeb9c224afdd9bf8f2e39a9b3fefffa9c1418f 100644
--- a/third_party/protobuf/.gitignore
+++ b/third_party/protobuf/.gitignore
@@ -60,13 +60,10 @@ python/build/
 python/google/protobuf/compiler/
 python/google/protobuf/util/
 
-src/js_embed
 src/protoc
 src/unittest_proto_middleman
 
 # Generated test scaffolding
-src/no_warning_test.cc
-src/no-warning-test
 src/protobuf*-test
 src/test_plugin
 src/testzip.*
@@ -80,8 +77,7 @@ src/**/*.log
 src/**/*.trs
 
 # JavaBuild output.
-java/core/target
-java/util/target
+java/target
 javanano/target
 
 # Windows native output.
@@ -92,14 +88,16 @@ build_msvc
 # packages themselves.
 /csharp/src/packages/*/
 
+# Directories created by opening the Objective C Xcode projects.
+objectivec/ProtocolBuffers_OSX.xcodeproj/project.xcworkspace/xcuserdata/
+objectivec/ProtocolBuffers_OSX.xcodeproj/project.xcworkspace/xcshareddata/ProtocolBuffers_OSX.xccheckout
+objectivec/ProtocolBuffers_OSX.xcodeproj/xcuserdata/
+objectivec/ProtocolBuffers_iOS.xcodeproj/project.xcworkspace/xcuserdata/
+objectivec/ProtocolBuffers_iOS.xcodeproj/project.xcworkspace/xcshareddata/ProtocolBuffers_iOS.xccheckout
+objectivec/ProtocolBuffers_iOS.xcodeproj/xcuserdata/
 # OS X's Finder creates these for state about opened windows/etc.
 **/.DS_Store
 
-# Cocoapods artifacts
-# Podfile.lock and the workspace file are tracked, to ease deleting them. That's
-# needed to trigger "pod install" to rerun the preinstall commands.
-Pods/
-
 # Comformance test output
 conformance/.libs/
 conformance/com/
@@ -112,35 +110,8 @@ conformance/conformance.pb.cc
 conformance/conformance.pb.h
 conformance/Conformance.pbobjc.h
 conformance/Conformance.pbobjc.m
-conformance/conformance_pb.rb
-conformance/failing_tests.txt
+conformance/conformance.rb
 conformance/google/
 conformance/javac_middleman
 conformance/lite/
-conformance/nonexistent_tests.txt
 conformance/protoc_middleman
-conformance/succeeding_tests.txt
-
-# php test output
-composer.lock
-php/tests/generated/
-php/ext/google/protobuf/.libs/
-php/ext/google/protobuf/Makefile.fragments
-php/ext/google/protobuf/Makefile.global
-php/ext/google/protobuf/Makefile.objects
-php/ext/google/protobuf/acinclude.m4
-php/ext/google/protobuf/build/
-php/ext/google/protobuf/config.h
-php/ext/google/protobuf/config.nice
-php/ext/google/protobuf/configure.in
-php/ext/google/protobuf/mkinstalldirs
-php/ext/google/protobuf/run-tests.php
-vendor/
-
-# JavaScript artifacts
-js/commonjs_out/
-js/deps.js
-js/google-protobuf.js
-js/google/
-js/node_modules/
-js/testproto_libs.js