Convert system/core to Result::ok()

No functionality changes, this is a mechanical cleanup.

Test: m
Test: cd system/core && atest
Change-Id: Ifdaa3ce1947ed578f656d5a446978726eb416c36
diff --git a/init/parser.cpp b/init/parser.cpp
index 6ab61cb..507ee4a 100644
--- a/init/parser.cpp
+++ b/init/parser.cpp
@@ -61,7 +61,7 @@
         bad_section_found = false;
         if (section_parser == nullptr) return;
 
-        if (auto result = section_parser->EndSection(); !result) {
+        if (auto result = section_parser->EndSection(); !result.ok()) {
             parse_error_count_++;
             LOG(ERROR) << filename << ": " << section_start_line << ": " << result.error();
         }
@@ -92,7 +92,7 @@
                 if (line_callback != line_callbacks_.end()) {
                     end_section();
 
-                    if (auto result = line_callback->second(std::move(args)); !result) {
+                    if (auto result = line_callback->second(std::move(args)); !result.ok()) {
                         parse_error_count_++;
                         LOG(ERROR) << filename << ": " << state.line << ": " << result.error();
                     }
@@ -101,8 +101,8 @@
                     section_parser = section_parsers_[args[0]].get();
                     section_start_line = state.line;
                     if (auto result =
-                            section_parser->ParseSection(std::move(args), filename, state.line);
-                        !result) {
+                                section_parser->ParseSection(std::move(args), filename, state.line);
+                        !result.ok()) {
                         parse_error_count_++;
                         LOG(ERROR) << filename << ": " << state.line << ": " << result.error();
                         section_parser = nullptr;
@@ -110,7 +110,7 @@
                     }
                 } else if (section_parser) {
                     if (auto result = section_parser->ParseLineSection(std::move(args), state.line);
-                        !result) {
+                        !result.ok()) {
                         parse_error_count_++;
                         LOG(ERROR) << filename << ": " << state.line << ": " << result.error();
                     }
@@ -143,7 +143,7 @@
     LOG(INFO) << "Parsing file " << path << "...";
     android::base::Timer t;
     auto config_contents = ReadFile(path);
-    if (!config_contents) {
+    if (!config_contents.ok()) {
         LOG(INFO) << "Unable to read config file '" << path << "': " << config_contents.error();
         return false;
     }