Remove unreachable code.

Source/core/css/MediaValues.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/MediaValues.h"
 
 #include "core/css/CSSHelper.h"
 #include "core/css/MediaValuesCached.h"
 #include "core/css/MediaValuesDynamic.h"
@@ skipping 178 matching lines @@
     case CSSPrimitiveValue::CSS_PT:
         factor = cssPixelsPerPoint;
         break;
     case CSSPrimitiveValue::CSS_PC:
         factor = cssPixelsPerPica;
         break;
     default:
         return false;
     }
 
+    ASSERT(factor > 0);
     result = value * factor;
     return true;
-
-    ASSERT(factor > 0);
 }
 
 } // namespace