Revert "[webkit] Postpone sending scroll message to webcore thread"

This reverts commit f91d0f41ff927279191ca43e0a4a30c248cf0dd5.
Revert "[webkit]Change the thread priority"

This reverts commit 136cd17747def0c48e4745bc3aea8478540f85f6.
Revert "[webkit] Runtime enablement of WebGL"

This reverts commit bc8520da8f24e7d95fc084d605673812c6a5757b.
Revert "Squashed commit of GPS changes from CodeAurora"

This reverts commit b9879160ec8970dacfb4da1801e7b9fb412a26d4.