Use std::vector<char> rather than std::string to represent a base::BinaryValue

tools/json_schema_compiler/cc_generator.py

Index: tools/json_schema_compiler/cc_generator.py
diff --git a/tools/json_schema_compiler/cc_generator.py b/tools/json_schema_compiler/cc_generator.py
index 1d243f03b5ad30fc582e4fb5083a2367eefe1cb7..a17217c24054d1b18b0c995a8ea87b9783dc3a33 100644
--- a/tools/json_schema_compiler/cc_generator.py
+++ b/tools/json_schema_compiler/cc_generator.py
@@ -160,7 +160,7 @@ class _Generator(object):
         items.append('%s(false)' % prop.unix_name)
       elif (t.property_type == PropertyType.ANY or
             t.property_type == PropertyType.ARRAY or
-            t.property_type == PropertyType.BINARY or  # mapped to std::string
+            t.property_type == PropertyType.BINARY or
             t.property_type == PropertyType.CHOICES or
             t.property_type == PropertyType.OBJECT or
             t.property_type == PropertyType.FUNCTION or
@@ -817,13 +817,14 @@ class _Generator(object):
         .Append('   static_cast<const base::BinaryValue*>(%(src_var)s);')
       )
       if is_ptr:
-        (c.Append('%(dst_var)s.reset(')
-          .Append('    new std::string(binary_value->GetBuffer(),')
-          .Append('                    binary_value->GetSize()));')
+        (c.Append('%(dst_var)s.reset(new std::vector<char>(')
+          .Append('    binary_value->GetBuffer(),')
+          .Append('    binary_value->GetBuffer() + binary_value->GetSize()));')
         )
       else:
-        (c.Append('%(dst_var)s.assign(binary_value->GetBuffer(),')
-          .Append('                   binary_value->GetSize());')
+        (c.Append('%(dst_var)s.assign(')
+          .Append('    binary_value->GetBuffer(),')
+          .Append('    binary_value->GetBuffer() + binary_value->GetSize());')
         )
       c.Eblock('}')
     else: