17612 Remove Samsung workaround (cla: yes)

17613 Revert getSystemGestureExclusionRects and setSystemGestureExclusionRects (cla: yes)

17615 [web] Combine duplicate platform message spy implementations (affects: tests, cla: yes, platform-web)

17616 make compiler worker count configurable; increase default (cla: yes)

17617 Eliminate verify_framework presubmit step (cla: yes)

17620 Roll src/third_party/skia 8561fc23c927..854ac61e90a4 (36 commits) (cla: yes, waiting for tree to go green)

17621 Optimize static content scrolling (cla: yes, perf: speed, severe: performance)