Always evaluate media features to true without MediaValues.

third_party/WebKit/Source/core/css/MediaQueryEvaluator.cpp

 /*
  * CSS Media Query Evaluator
  *
  * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ skipping 49 matching lines @@
 using namespace MediaFeatureNames;
 
 enum MediaFeaturePrefix { MinPrefix, MaxPrefix, NoPrefix };
 
 using EvalFunc = bool (*)(const MediaQueryExpValue&,
                           MediaFeaturePrefix,
                           const MediaValues&);
 using FunctionMap = HashMap<StringImpl*, EvalFunc>;
 static FunctionMap* gFunctionMap;
 
-MediaQueryEvaluator::MediaQueryEvaluator(bool mediaFeatureResult)
-    : m_expectedResult(mediaFeatureResult) {}
-
-MediaQueryEvaluator::MediaQueryEvaluator(const char* acceptedMediaType,
-                                         bool mediaFeatureResult)
-    : m_mediaType(acceptedMediaType), m_expectedResult(mediaFeatureResult) {}
+MediaQueryEvaluator::MediaQueryEvaluator(const char* acceptedMediaType)
+    : m_mediaType(acceptedMediaType) {}
 
 MediaQueryEvaluator::MediaQueryEvaluator(LocalFrame* frame)
     : m_mediaValues(MediaValues::createDynamicIfFrameExists(frame)) {}
 
 MediaQueryEvaluator::MediaQueryEvaluator(const MediaValues& mediaValues)
     : m_mediaValues(mediaValues.copy()) {}
 
 MediaQueryEvaluator::MediaQueryEvaluator(
     MediaValuesInitialViewport* mediaValues)
     : m_mediaValues(mediaValues) {
@@ skipping 652 matching lines @@
   // Create the table.
   gFunctionMap = new FunctionMap;
 #define ADD_TO_FUNCTIONMAP(name) \
   gFunctionMap->set(name##MediaFeature.impl(), name##MediaFeatureEval);
   CSS_MEDIAQUERY_NAMES_FOR_EACH_MEDIAFEATURE(ADD_TO_FUNCTIONMAP);
 #undef ADD_TO_FUNCTIONMAP
 }
 
 bool MediaQueryEvaluator::eval(const MediaQueryExp* expr) const {
   if (!m_mediaValues || !m_mediaValues->hasValues())
-    return m_expectedResult;
+    return true;
 
   DCHECK(gFunctionMap);
 
   // Call the media feature evaluation function. Assume no prefix and let
   // trampoline functions override the prefix if prefix is used.
   EvalFunc func = gFunctionMap->get(expr->mediaFeature().impl());
   if (func)
     return func(expr->expValue(), NoPrefix, *m_mediaValues);
 
   return false;
 }
 
 }  // namespace blink