Bug 1053634: Force use Nuwa
Bug 1032125: Part 1: Prevent from sending message to Nuwa after Nuwa frozen
Bug 1032125: Part 2: Don't send frame messages to Nuwa process after Nuwa has been frozen
Bug 1032125: Part 3: Prevent DOM Storage from sending IPC after Nuwa ready
Bug 1053634: Try call the next Runnable if calling to a Runnable doesn't consume the newly-created preallocated process.
Bug 1053634: Remove callback of a frame loader from the run-after-fork list if the frame loader for some reason got a content parent successfully before the callback it posted had run.
log time difference between app start and first preallocated process ready
measure preallocated process ready time
Bug 970307: Part 1: add nsThreadStatusManager to collect thread information.
Bug 970307: Part 2: Inform nsThreadStatusManager when the thread becomes idle or busy.
Bug 970307: Part 3: Preload in Nuwa and wait until finish loading preload.
Bug 970307: Part 4: Copy ContentParent::mIsNuwaProcess from Nuwa process
Bug 970307: Part 5: Reinitialize modules after fork
log time difference between nuwa waiting and nuwa can freeze, and nuwa can freeze and nuwa ready