Implement get trap for proxies.

test/cctest/test-debug.cc

 // 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 4246 matching lines @@
   // Get the interceptor properties for the object with only named interceptor.
   CompileRun("named_values = named_mirror.properties()");
 
   // Check that the properties are interceptor properties.
   for (int i = 0; i < 3; i++) {
     EmbeddedVector<char, SMALL_STRING_BUFFER_SIZE> buffer;
     OS::SNPrintF(buffer,
                  "named_values[%d] instanceof debug.PropertyMirror", i);
     CHECK(CompileRun(buffer.start())->BooleanValue());
 
-    // 4 is PropertyType.Interceptor
+    // 5 is PropertyType.Interceptor
     OS::SNPrintF(buffer, "named_values[%d].propertyType()", i);
-    CHECK_EQ(4, CompileRun(buffer.start())->Int32Value());
+    CHECK_EQ(5, CompileRun(buffer.start())->Int32Value());
 
     OS::SNPrintF(buffer, "named_values[%d].isNative()", i);
     CHECK(CompileRun(buffer.start())->BooleanValue());
   }
 
   // Get the interceptor properties for the object with only indexed
   // interceptor.
   CompileRun("indexed_values = indexed_mirror.properties()");
 
   // Check that the properties are interceptor properties.
@@ skipping 2980 matching lines @@
   TestDebugBreakInLoop("for (;;) {", loop_bodies, "}");
   TestDebugBreakInLoop("for (;a == 1;) {", loop_bodies, "}");
 
   // Get rid of the debug event listener.
   v8::Debug::SetDebugEventListener(NULL);
   CheckDebuggerUnloaded();
 }
 
 
 #endif  // ENABLE_DEBUGGER_SUPPORT