diff --git a/tools/gn/input_conversion.cc b/tools/gn/input_conversion.cc
index efdff1a..e64323a 100644
--- a/tools/gn/input_conversion.cc
+++ b/tools/gn/input_conversion.cc
@@ -19,34 +19,6 @@
 
 namespace {
 
-// Returns the "first bit" of some script output for writing to error messages.
-std::string GetExampleOfBadInput(const std::string& input) {
-  std::string result(input);
-
-  // Maybe the result starts with a blank line or something, which we don't
-  // want.
-  TrimWhitespaceASCII(result, TRIM_ALL, &result);
-
-  // Now take the first line, or the first set of chars, whichever is shorter.
-  bool trimmed = false;
-  size_t newline_offset = result.find('\n');
-  if (newline_offset != std::string::npos) {
-    trimmed = true;
-    result.resize(newline_offset);
-  }
-  TrimWhitespaceASCII(result, TRIM_ALL, &result);
-
-  const size_t kMaxSize = 50;
-  if (result.size() > kMaxSize) {
-    trimmed = true;
-    result.resize(kMaxSize);
-  }
-
-  if (trimmed)
-    result.append("...");
-  return result;
-}
-
 // When parsing the result as a value, we may get various types of errors.
 // This creates an error message for this case with an optional nested error
 // message to reference. If there is no nested err, pass Err().
diff --git a/tools/gn/parser.cc b/tools/gn/parser.cc
index 649d4cf..6392eed 100644
--- a/tools/gn/parser.cc
+++ b/tools/gn/parser.cc
@@ -18,17 +18,6 @@
 // else       := 'else' (if | statement)*
 // assignment := ident {'=' | '+=' | '-='} expr
 
-namespace {
-
-// Returns true if the two tokens are on the same line. We assume they're in
-// the same file.
-bool IsSameLine(const Token& a, const Token& b) {
-  DCHECK(a.location().file() == b.location().file());
-  return a.location().line_number() == b.location().line_number();
-}
-
-}  // namespace
-
 enum Precedence {
   PRECEDENCE_ASSIGNMENT = 1,
   PRECEDENCE_OR = 2,
diff --git a/tools/gn/setup.cc b/tools/gn/setup.cc
index 47a243a..ae02bf1 100644
--- a/tools/gn/setup.cc
+++ b/tools/gn/setup.cc
@@ -99,6 +99,7 @@
   return FindDotFile(up_one_dir);
 }
 
+#if defined(OS_WIN)
 // Searches the list of strings, and returns the FilePat corresponding to the
 // one ending in the given substring, or the empty path if none match.
 base::FilePath GetPathEndingIn(
@@ -111,13 +112,12 @@
   return base::FilePath();
 }
 
-// Fins the depot tools directory in the path environment variable and returns
+// Finds the depot tools directory in the path environment variable and returns
 // its value. Returns an empty file path if not found.
 //
 // We detect the depot_tools path by looking for a directory with depot_tools
 // at the end (optionally followed by a separator).
 base::FilePath ExtractDepotToolsFromPath() {
-#if defined(OS_WIN)
   static const wchar_t kPathVarName[] = L"Path";
   DWORD env_buf_size = GetEnvironmentVariable(kPathVarName, NULL, 0);
   if (env_buf_size == 0)
@@ -132,17 +132,6 @@
   base::SplitString(path, ';', &components);
 
   base::string16 ending_in1 = L"depot_tools\\";
-#else
-  static const char kPathVarName[] = "PATH";
-  const char* path = getenv(kPathVarName);
-  if (!path)
-    return base::FilePath();
-
-  std::vector<std::string> components;
-  base::SplitString(path, ':', &components);
-
-  std::string ending_in1 = "depot_tools/";
-#endif
   base::FilePath::StringType ending_in2 = FILE_PATH_LITERAL("depot_tools");
 
   base::FilePath found = GetPathEndingIn(components, ending_in1);
@@ -150,6 +139,7 @@
     return found;
   return GetPathEndingIn(components, ending_in2);
 }
+#endif
 
 }  // namespace