Fix handling of this in direct calls to function proxies.

src/messages.js

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 167 matching lines @@
       "reduce_no_initial",            ["Reduce of empty array with no initial value"],
       "getter_must_be_callable",      ["Getter must be a function: ", "%0"],
       "setter_must_be_callable",      ["Setter must be a function: ", "%0"],
       "value_and_accessor",           ["Invalid property.  A property cannot both have accessors and be writable or have a value, ", "%0"],
       "proto_object_or_null",         ["Object prototype may only be an Object or null"],
       "property_desc_object",         ["Property description must be an object: ", "%0"],
       "redefine_disallowed",          ["Cannot redefine property: ", "%0"],
       "define_disallowed",            ["Cannot define property:", "%0", ", object is not extensible."],
       "non_extensible_proto",         ["%0", " is not extensible"],
       "handler_non_object",           ["Proxy.", "%0", " called with non-object as handler"],
-      "trap_function_expected",       ["Proxy.", "%0", " called with non-function for ", "%1", " trap"],
+      "trap_function_expected",       ["Proxy.", "%0", " called with non-function for '", "%1", "' trap"],
       "handler_trap_missing",         ["Proxy handler ", "%0", " has no '", "%1", "' trap"],
       "handler_trap_must_be_callable", ["Proxy handler ", "%0", " has non-callable '", "%1", "' trap"],
-      "handler_returned_false",       ["Proxy handler ", "%0", " returned false for '", "%1", "' trap"],
-      "handler_returned_undefined",   ["Proxy handler ", "%0", " returned undefined for '", "%1", "' trap"],
-      "proxy_prop_not_configurable",  ["Trap ", "%1", " of proxy handler ", "%0", " returned non-configurable descriptor for property ", "%2"],
-      "proxy_non_object_prop_names",  ["Trap ", "%1", " returned non-object ", "%0"],
-      "proxy_repeated_prop_name",     ["Trap ", "%1", " returned repeated property name ", "%2"],
+      "handler_returned_false",       ["Proxy handler ", "%0", " returned false from '", "%1", "' trap"],
+      "handler_returned_undefined",   ["Proxy handler ", "%0", " returned undefined from '", "%1", "' trap"],
+      "proxy_prop_not_configurable",  ["Proxy handler ", "%0", " returned non-configurable descriptor for property '", "%2", "' from '", "%1", "' trap"],
+      "proxy_non_object_prop_names",  ["Trap '", "%1", "' returned non-object ", "%0"],
+      "proxy_repeated_prop_name",     ["Trap '", "%1", "' returned repeated property name '", "%2", "'"],
       "invalid_weakmap_key",          ["Invalid value used as weak map key"],
       // RangeError
       "invalid_array_length",         ["Invalid array length"],
       "stack_overflow",               ["Maximum call stack size exceeded"],
       // SyntaxError
       "unable_to_parse",              ["Parse error"],
       "invalid_regexp_flags",         ["Invalid flags supplied to RegExp constructor '", "%0", "'"],
       "invalid_regexp",               ["Invalid RegExp pattern /", "%0", "/"],
       "illegal_break",                ["Illegal break statement"],
       "illegal_continue",             ["Illegal continue statement"],
@@ skipping 978 matching lines @@
     throw e;
   }
 }
 
 
 InstallFunctions($Error.prototype, DONT_ENUM, ['toString', errorToString]);
 
 // Boilerplate for exceptions for stack overflows. Used from
 // Isolate::StackOverflow().
 const kStackOverflowBoilerplate = MakeRangeError('stack_overflow', []);