Migrate core/block_drag_surface.js named requires
Migrate core/block_drag_surface.js named requires

rachel-fenichel/blockly,google/blockly,mark-friedman/blockly,rachel-fenichel/blockly,google/blockly,google/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,mark-friedman/blockly,mark-friedman/blockly,google/blockly,mark-friedman/blockly,mark-friedman/blockly,mark-friedman/blockly,google/blockly,rachel-fenichel/blockly,google/blockly,rachel-fenichel/blockly,google/blockly,rachel-fenichel/blockly