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reveman@chromium.org authored
This moves thread pool related code out of the tile manager and into a new RasterWorkerPool class. This doesn't change the behavior of the tile manager in any way it just separates tile management logic from the thread handling logic, which results in a significant cleanup of the tile manager. BUG=155209 TEST=manual Review URL: https://chromiumcodereview.appspot.com/11593030 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@175877 0039d316-1c4b-4281-b951-d872f2087c987489ffb2
