Revert 245645 "Define WebScrollOffsetAnimationCurveImpl"

Revert 245645 "Define WebScrollOffsetAnimationCurveImpl"

Broke compositor_unittests on Linux Aura Tests with error:

  LayerWithRealCompositorTest.DrawPixels (run #1):
  [ RUN      ] LayerWithRealCompositorTest.DrawPixels
  ../../ui/compositor/layer_unittest.cc:832: Failure
  Value of: ReadPixels(&bitmap, gfx::Rect(viewport_size))
    Actual: false
  Expected: true
  [  FAILED  ] LayerWithRealCompositorTest.DrawPixels (246 ms)

  LayerWithRealCompositorTest.DrawPixels (run #2):
  [ RUN      ] LayerWithRealCompositorTest.DrawPixels
  ../../ui/compositor/layer_unittest.cc:832: Failure
  Value of: ReadPixels(&bitmap, gfx::Rect(viewport_size))
    Actual: false
  Expected: true
  [  FAILED  ] LayerWithRealCompositorTest.DrawPixels (272 ms)

  LayerWithRealCompositorTest.DrawPixels (run #3):
  [ RUN      ] LayerWithRealCompositorTest.DrawPixels
  ../../ui/compositor/layer_unittest.cc:832: Failure
  Value of: ReadPixels(&bitmap, gfx::Rect(viewport_size))
    Actual: false
  Expected: true
  [  FAILED  ] LayerWithRealCompositorTest.DrawPixels (259 ms)

  LayerWithRealCompositorTest.DrawPixels (run #4):
  [ RUN      ] LayerWithRealCompositorTest.DrawPixels
  ../../ui/compositor/layer_unittest.cc:832: Failure
  Value of: ReadPixels(&bitmap, gfx::Rect(viewport_size))
    Actual: false
  Expected: true
  [  FAILED  ] LayerWithRealCompositorTest.DrawPixels (229 ms)

> Define WebScrollOffsetAnimationCurveImpl
> 
> This defines WebScrollOffsetAnimationCurveImpl, which wraps a
> cc::ScrollOffsetAnimationCurve. This is needed for
> implementing the CSSOM Smooth Scroll API.
> 
> BUG=243871
> 
> Review URL: https://codereview.chromium.org/112933005

TBR=ajuma@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=245663

[Dan Beam, 2014-01-17 23:58:56]

Committed patchset #1 manually as r245663 (tree was closed).