CSS4: Implement :placeholder-shown pseudo class

Source/core/inspector/InspectorTraceEvents.cpp

 // 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 "config.h"
 #include "core/inspector/InspectorTraceEvents.h"
 
 #include "bindings/core/v8/ScriptCallStackFactory.h"
 #include "core/animation/Animation.h"
 #include "core/animation/KeyframeEffect.h"
@@ skipping 80 matching lines @@
         DEFINE_STRING_MAPPING(PseudoHover)
         DEFINE_STRING_MAPPING(PseudoDrag)
         DEFINE_STRING_MAPPING(PseudoFocus)
         DEFINE_STRING_MAPPING(PseudoActive)
         DEFINE_STRING_MAPPING(PseudoChecked)
         DEFINE_STRING_MAPPING(PseudoEnabled)
         DEFINE_STRING_MAPPING(PseudoFullPageMedia)
         DEFINE_STRING_MAPPING(PseudoDefault)
         DEFINE_STRING_MAPPING(PseudoDisabled)
         DEFINE_STRING_MAPPING(PseudoOptional)
+        DEFINE_STRING_MAPPING(PseudoPlaceholderShown)
         DEFINE_STRING_MAPPING(PseudoRequired)
         DEFINE_STRING_MAPPING(PseudoReadOnly)
         DEFINE_STRING_MAPPING(PseudoReadWrite)
         DEFINE_STRING_MAPPING(PseudoValid)
         DEFINE_STRING_MAPPING(PseudoInvalid)
         DEFINE_STRING_MAPPING(PseudoIndeterminate)
         DEFINE_STRING_MAPPING(PseudoTarget)
         DEFINE_STRING_MAPPING(PseudoBefore)
         DEFINE_STRING_MAPPING(PseudoAfter)
         DEFINE_STRING_MAPPING(PseudoBackdrop)
@@ skipping 660 matching lines @@
     if (request.move())
         value->setBoolean("move", true);
     if (request.listBased())
         value->setBoolean("listBased", true);
     else if (Node* node = result.innerNode())
         setNodeInfo(value.get(), node, "nodeId", "nodeName");
     return value;
 }
 
 }