qcom-opensource/webkit: slow down TBS on pageload

TBS was too aggressive in pre-rendering that it
degrades page load and v8 performance.  This patch
allows the TBS thread to process updates in lower
priority during page load.

Change-Id: Ic6a1513f3b8a14dc15cc4e0be03481d4521c0698
1 file changed
tree: 47012f060d69f561e22cbaa5ce47258f9cd2f0b8
  1. BackingStore/
  2. WKAccel.h