CSSPaint: Move layout tests in csspaint/ to http/tests/csspaint/

third_party/WebKit/LayoutTests/csspaint/resources/generate-paint-style-logging.js

-// Generates code for a CSS paint API function which logs the given properties
-// to the console.
-//
-// Usage:
-// generatePaintStyleLogging([
-//      '--foo',
-//      'line-height',
-// ]);
-
-function generatePaintStyleLogging(properties) {
-    const json = JSON.stringify(properties);
-    return `
-        registerPaint('test', class {
-            static get inputProperties() { return ${json}; }
-            paint(ctx, geom, styleMap) {
-                const properties = styleMap.getProperties().sort();
-                for (let i = 0; i < properties.length; i++) {
-                    const value = styleMap.get(properties[i]);
-                    let serialized;
-                    if (value) {
-                        serialized = '[' + value.constructor.name + '=' + value.cssText + ']';
-                    } else {
-                        serialized = '[null]';
-                    }
-                    console.log(properties[i] + ': ' + serialized);
-                }
-            }
-        });
-    `;
-}