Change PP_Flash_BrowserOperations_SiteSetting.site from PP_Var to const char*.

ppapi/generators/idl_c_proto.py

Index: ppapi/generators/idl_c_proto.py
diff --git a/ppapi/generators/idl_c_proto.py b/ppapi/generators/idl_c_proto.py
index ccb9946efaa12e5b2185d75bfbd0334443c9b70c..dffd375f8864110dfdc42c4d89754068e6132d0e 100755
--- a/ppapi/generators/idl_c_proto.py
+++ b/ppapi/generators/idl_c_proto.py
@@ -123,6 +123,13 @@ class CGen(object):
       'return': 'const %s',
       'store': '%s'
     },
+    'cstr_t': {
+      'in': '%s',
+      'inout': '%s*',
+      'out': '%s*',
+      'return': '%s',
+      'store': '%s'
+    },
     'TypeValue': {
       'in': '%s',
       'inout': '%s*',
@@ -146,6 +153,7 @@ class CGen(object):
   'handle_t': 'int',
   'mem_t': 'void*',
   'str_t': 'char*',
+  'cstr_t': 'const char*',
   'interface_t' : 'const void*'
   }