[src/Layout-test-utils.js]: Added testMeasurePrecision and inplaceRoundNumbersInObject which snap the numbers to pixels so that we don't have to re-adjust for each browser version (Chrome 42 changed their computation, it can output floating point values for dom elements) ;
[src/Layout-test-utils.js]: Added testMeasurePrecision and inplaceRoundNumbersInObject which snap the numbers to pixels so that we don't have to re-adjust for each browser version (Chrome 42 changed their computation, it can output floating point values for dom elements) ;

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