third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_helpers.h

Index: third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_helpers.h
diff --git a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_helpers.h b/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_helpers.h
index 018acfcad0f0f78f6e396d320d83f1e447ad8566..c988bda8a0407b1a8bc198bc3e8d45cf551cc430 100644
--- a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_helpers.h
+++ b/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_helpers.h
@@ -147,8 +147,11 @@ string FilenameIdentifier(const string& filename);
 // Return the name of the AddDescriptors() function for a given file.
 string GlobalAddDescriptorsName(const string& filename);
 
-// Return the name of the AssignDescriptors() function for a given file.
-string GlobalAssignDescriptorsName(const string& filename);
+// Return the name of the InitDefaults() function for a given file.
+string GlobalInitDefaultsName(const string& filename);
+
+// Return the name of the offset table function for a given file.
+string GlobalOffsetTableName(const string& filename);
 
 // Return the qualified C++ name for a file level symbol.
 string QualifiedFileLevelSymbol(const string& package, const string& name);
@@ -223,22 +226,6 @@ inline bool HasFastArraySerialization(const FileDescriptor* file,
 bool StaticInitializersForced(const FileDescriptor* file,
                               const Options& options);
 
-// Prints 'with_static_init' if static initializers have to be used for the
-// provided file. Otherwise emits both 'with_static_init' and
-// 'without_static_init' using #ifdef.
-void PrintHandlingOptionalStaticInitializers(
-    const FileDescriptor* file, const Options& options, io::Printer* printer,
-    const char* with_static_init, const char* without_static_init,
-    const char* var1 = NULL, const string& val1 = "", const char* var2 = NULL,
-    const string& val2 = "");
-
-void PrintHandlingOptionalStaticInitializers(const map<string, string>& vars,
-                                             const FileDescriptor* file,
-                                             const Options& options,
-                                             io::Printer* printer,
-                                             const char* with_static_init,
-                                             const char* without_static_init);
-
 
 inline bool IsMapEntryMessage(const Descriptor* descriptor) {
   return descriptor->options().map_entry();
@@ -282,13 +269,13 @@ bool IsWellKnownMessage(const FileDescriptor* descriptor);
 
 void GenerateUtf8CheckCodeForString(const FieldDescriptor* field,
                                     const Options& options, bool for_parse,
-                                    const map<string, string>& variables,
+                                    const std::map<string, string>& variables,
                                     const char* parameters,
                                     io::Printer* printer);
 
 void GenerateUtf8CheckCodeForCord(const FieldDescriptor* field,
                                   const Options& options, bool for_parse,
-                                  const map<string, string>& variables,
+                                  const std::map<string, string>& variables,
                                   const char* parameters, io::Printer* printer);
 
 inline ::google::protobuf::FileOptions_OptimizeMode GetOptimizeFor(