Avoid rounding down viewport dimensions in Media Queries

third_party/WebKit/Source/core/css/MediaValuesDynamic.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/css/MediaValuesDynamic.h"
 
 #include "core/css/CSSHelper.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/CSSToLengthConversionData.h"
@@ skipping 44 matching lines @@
         calculateViewportWidth(m_frame),
         calculateViewportHeight(m_frame),
         result);
 }
 
 bool MediaValuesDynamic::isSafeToSendToAnotherThread() const
 {
     return false;
 }
 
-int MediaValuesDynamic::viewportWidth() const
+double MediaValuesDynamic::viewportWidth() const
 {
     return calculateViewportWidth(m_frame);
 }
 
-int MediaValuesDynamic::viewportHeight() const
+double MediaValuesDynamic::viewportHeight() const
 {
     return calculateViewportHeight(m_frame);
 }
 
 int MediaValuesDynamic::deviceWidth() const
 {
     return calculateDeviceWidth(m_frame);
 }
 
 int MediaValuesDynamic::deviceHeight() const
@@ skipping 66 matching lines @@
     return m_frame;
 }
 
 DEFINE_TRACE(MediaValuesDynamic)
 {
     visitor->trace(m_frame);
     MediaValues::trace(visitor);
 }
 
 } // namespace