Handle Mozilla license blocks in the GN header checker.

tools/gn/c_include_iterator.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "tools/gn/c_include_iterator.h"
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "tools/gn/input_file.h"
 #include "tools/gn/location.h"
@@ skipping 30 matching lines @@
 // We only handle C-style "//" comments since this is the normal commenting
 // style used in Chrome, and do so pretty stupidly. We don't want to write a
 // full C++ parser here, we're just trying to get a good heuristic for checking
 // the file.
 //
 // We assume the line has leading whitespace trimmed. We also assume that empty
 // lines have already been filtered out.
 bool ShouldCountTowardNonIncludeLines(const base::StringPiece& line) {
   if (StartsWith(line, "//"))
     return false;  // Don't count comments.
+  if (StartsWith(line, "/*") || StartsWith(line, " *"))
+    return false;  // C-style comment blocks with stars along the left side.
   if (StartsWith(line, "#"))
     return false;  // Don't count preprocessor.
   if (base::ContainsOnlyChars(line, base::kWhitespaceASCII))
     return false;  // Don't count whitespace lines.
   return true;  // Count everything else.
 }
 
 // Given a line, checks to see if it looks like an include or import and
 // extract the path. The type of include is returned. Returns INCLUDE_NONE on
 // error or if this is not an include line.
@@ skipping 106 matching lines @@
   line_number_++;
 
   *line = file_.substr(begin, offset_ - begin);
   *line_number = line_number_;
 
   // If we didn't hit EOF, skip past the newline for the next one.
   if (offset_ < file_.size())
     offset_++;
   return true;
 }