| Index: cc/trees/layer_tree_host_common_unittest.cc
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| diff --git a/cc/trees/layer_tree_host_common_unittest.cc b/cc/trees/layer_tree_host_common_unittest.cc
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| index a26ee7f4559f8ea6d2c656289610dafc390d88fb..7a3192b2e892a493b2a42d988ce4de489b9e6509 100644
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| --- a/cc/trees/layer_tree_host_common_unittest.cc
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| +++ b/cc/trees/layer_tree_host_common_unittest.cc
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| @@ -6331,7 +6331,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionTop) {
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|    sticky_position.is_sticky = true;
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|    sticky_position.is_anchored_top = true;
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|    sticky_position.top_offset = 10.0f;
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| -  sticky_position.parent_relative_sticky_box_offset = gfx::Point(10, 20);
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|    sticky_position.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(10, 20, 10, 10);
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|    sticky_position.scroll_container_relative_containing_block_rect =
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| @@ -6407,7 +6406,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionTopScrollParent) {
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|    sticky_position.is_sticky = true;
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|    sticky_position.is_anchored_top = true;
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|    sticky_position.top_offset = 10.0f;
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| -  sticky_position.parent_relative_sticky_box_offset = gfx::Point(10, 20);
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|    sticky_position.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(10, 20, 10, 10);
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|    sticky_position.scroll_container_relative_containing_block_rect =
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| @@ -6480,7 +6478,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionSubpixelScroll) {
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|    sticky_position.is_sticky = true;
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|    sticky_position.is_anchored_bottom = true;
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|    sticky_position.bottom_offset = 10.0f;
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| -  sticky_position.parent_relative_sticky_box_offset = gfx::Point(0, 200);
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|    sticky_position.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(0, 200, 10, 10);
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|    sticky_position.scroll_container_relative_containing_block_rect =
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| @@ -6526,7 +6523,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionBottom) {
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|    sticky_position.is_sticky = true;
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|    sticky_position.is_anchored_bottom = true;
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|    sticky_position.bottom_offset = 10.0f;
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| -  sticky_position.parent_relative_sticky_box_offset = gfx::Point(0, 150);
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|    sticky_position.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(0, 150, 10, 10);
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|    sticky_position.scroll_container_relative_containing_block_rect =
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| @@ -6599,7 +6595,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionBottomInnerViewportDelta) {
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|    sticky_position.is_sticky = true;
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|    sticky_position.is_anchored_bottom = true;
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|    sticky_position.bottom_offset = 10.0f;
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| -  sticky_position.parent_relative_sticky_box_offset = gfx::Point(0, 70);
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|    sticky_position.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(0, 70, 10, 10);
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|    sticky_position.scroll_container_relative_containing_block_rect =
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| @@ -6678,7 +6673,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionBottomOuterViewportDelta) {
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|    sticky_position.is_sticky = true;
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|    sticky_position.is_anchored_bottom = true;
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|    sticky_position.bottom_offset = 10.0f;
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| -  sticky_position.parent_relative_sticky_box_offset = gfx::Point(0, 70);
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|    sticky_position.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(0, 70, 10, 10);
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|    sticky_position.scroll_container_relative_containing_block_rect =
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| @@ -6755,7 +6749,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionLeftRight) {
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|    sticky_position.is_anchored_right = true;
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|    sticky_position.left_offset = 10.f;
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|    sticky_position.right_offset = 10.f;
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| -  sticky_position.parent_relative_sticky_box_offset = gfx::Point(145, 0);
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|    sticky_position.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(145, 0, 10, 10);
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|    sticky_position.scroll_container_relative_containing_block_rect =
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| @@ -6858,7 +6851,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionMainThreadUpdates) {
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|    sticky_position.is_sticky = true;
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|    sticky_position.is_anchored_top = true;
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|    sticky_position.top_offset = 10.0f;
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| -  sticky_position.parent_relative_sticky_box_offset = gfx::Point(10, 20);
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|    sticky_position.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(10, 20, 10, 10);
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|    sticky_position.scroll_container_relative_containing_block_rect =
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| @@ -6904,6 +6896,7 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionMainThreadUpdates) {
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|    // Now the main thread commits the new position of the sticky element.
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|    scroller->SetScrollOffset(gfx::ScrollOffset(15, 15));
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|    sticky_pos->SetPosition(gfx::PointF(10, 25));
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| +  sticky_pos->SetStickyMainThreadOffset(gfx::Size(0, 5));
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|    ExecuteCalculateDrawProperties(root.get());
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|    host()->host_impl()->CreatePendingTree();
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|    host()->CommitAndCreatePendingTree();
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| @@ -6950,10 +6943,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionCompositedContainer) {
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|    sticky_position.is_sticky = true;
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|    sticky_position.is_anchored_top = true;
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|    sticky_position.top_offset = 10.0f;
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| -  // The sticky position layer is only offset by (0, 10) from its parent
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| -  // layer, this position is used to determine the offset applied by the main
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| -  // thread.
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| -  sticky_position.parent_relative_sticky_box_offset = gfx::Point(0, 10);
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|    sticky_position.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(20, 30, 10, 10);
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|    sticky_position.scroll_container_relative_containing_block_rect =
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| @@ -7001,6 +6990,7 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionCompositedContainer) {
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|    // Now the main thread commits the new position of the sticky element.
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|    scroller->SetScrollOffset(gfx::ScrollOffset(0, 25));
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|    sticky_pos->SetPosition(gfx::PointF(0, 15));
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| +  sticky_pos->SetStickyMainThreadOffset(gfx::Size(0, 5));
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|    ExecuteCalculateDrawProperties(root.get());
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|    host()->host_impl()->CreatePendingTree();
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|    host()->CommitAndCreatePendingTree();
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| @@ -7053,7 +7043,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionScaledStickyBox) {
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|    sticky_position.is_sticky = true;
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|    sticky_position.is_anchored_top = true;
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|    sticky_position.top_offset = 0.0f;
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| -  sticky_position.parent_relative_sticky_box_offset = gfx::Point(0, 20);
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|    sticky_position.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(0, 20, 10, 10);
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|    sticky_position.scroll_container_relative_containing_block_rect =
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| @@ -7132,7 +7121,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionScaledContainer) {
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|    sticky_position.is_sticky = true;
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|    sticky_position.is_anchored_top = true;
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|    sticky_position.top_offset = 0.0f;
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| -  sticky_position.parent_relative_sticky_box_offset = gfx::Point(0, 20);
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|    sticky_position.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(0, 20, 10, 10);
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|    sticky_position.scroll_container_relative_containing_block_rect =
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| @@ -7216,7 +7204,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionNested) {
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|    outer_sticky_pos.is_sticky = true;
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|    outer_sticky_pos.is_anchored_top = true;
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|    outer_sticky_pos.top_offset = 10.0f;
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| -  outer_sticky_pos.parent_relative_sticky_box_offset = gfx::Point(0, 50);
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|    outer_sticky_pos.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(0, 50, 10, 50);
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|    outer_sticky_pos.scroll_container_relative_containing_block_rect =
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| @@ -7227,7 +7214,6 @@ TEST_F(LayerTreeHostCommonTest, StickyPositionNested) {
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|    inner_sticky_pos.is_sticky = true;
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|    inner_sticky_pos.is_anchored_top = true;
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|    inner_sticky_pos.top_offset = 25.0f;
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| -  inner_sticky_pos.parent_relative_sticky_box_offset = gfx::Point(0, 0);
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|    inner_sticky_pos.scroll_container_relative_sticky_box_rect =
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|        gfx::Rect(0, 50, 10, 10);
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|    inner_sticky_pos.scroll_container_relative_containing_block_rect =
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| 
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