Don't use nonstandard %% dimension in unit tests

Source/core/css/CSSCalculationValueTest.cpp

 /*
  * Copyright (c) 2013, Google Inc. 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
@@ skipping 161 matching lines @@
 {
     CSSLengthArray expectation, actual;
     initLengthArray(expectation);
     EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "0")));
 
     expectation.at(CSSPrimitiveValue::UnitTypePixels) = 10;
     EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "10px")));
 
     expectation.at(CSSPrimitiveValue::UnitTypePixels) = 0;
     expectation.at(CSSPrimitiveValue::UnitTypePercentage) = 20;
-    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "20%%")));
+    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "20%")));
 
     expectation.at(CSSPrimitiveValue::UnitTypePixels) = 30;
     expectation.at(CSSPrimitiveValue::UnitTypePercentage) = -40;
-    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "calc(30px - 40%%)")));
+    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "calc(30px - 40%)")));
 
     expectation.at(CSSPrimitiveValue::UnitTypePixels) = 90;
     expectation.at(CSSPrimitiveValue::UnitTypePercentage) = 10;
-    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "calc(1in + 10%% - 6px)")));
+    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "calc(1in + 10% - 6px)")));
 
     expectation.at(CSSPrimitiveValue::UnitTypePixels) = 15;
     expectation.at(CSSPrimitiveValue::UnitTypeFontSize) = 20;
     expectation.at(CSSPrimitiveValue::UnitTypePercentage) = -40;
-    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "calc((1 * 2) * (5px + 20em / 2) - 80%% / (3 - 1) + 5px)")));
+    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "calc((1 * 2) * (5px + 20em / 2) - 80% / (3 - 1) + 5px)")));
 }
 
 }