How do you resize Hard Drive Using Disk Utility?

so I wanted to do a fresh reset of my computer so I created a new partition and installed mavericks on it. I backed up all my files and then deleted my old HD partion. Now I am left with "free space" and It wont let me make my Mavricks side bigger. Any one Know how to fix this?

Clone Mavericks, Lion/Mountain Lion using Restore Option of Disk Utility
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
     1. Select Disk Utility from the main menu then press the Continue
         button.
     2. Select the destination volume from the left side list.
     3. Click on the Restore tab in the DU main window.
     4. Select the destination volume from the left side list and drag it
         to the Destination entry field.
     5. Select the source volume from the left side list and drag it to
         the Source entry field.
     6. Double-check you got it right, then click on the Restore button.
Destination means the newly made first or top volume. Source means the old second or lower volume.
Alternatively, you can use the latest version of Carbon Copy Cloner 3.5.4 to clone your bottom volume to the top volume.

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