Callback interface for |dumpGCAndCCLogsToFile|, below. Note that
these method calls can occur before |dumpGCAndCCLogsToFile|
returns.
Called whenever a process has successfully finished dumping its GC/CC logs.
Incomplete dumps (e.g., if the child crashes or is killed due to memory
exhaustion) are not reported.
| aGCLog | The file that the GC log was written to. |
| aCCLog | The file that the CC log was written to. |
| aIsParent | indicates whether this log file pair is from the parent process. |
| Called when GC/CC logging has finished, after all calls to | onDump | . |