[CI] Remove an unused variable in InlineTextBoxPainter::Paint

I have confirmed that the unused adjusted_paint_offset is not a code
error. It had been used to calculate bounds of DrawingRecorder before
https://chromium-review.googlesource.com/729322.

Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Id9f0c71e36842e30f9c96fd093f209c90a276209
Reviewed-on: https://chromium-review.googlesource.com/1122965Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#571961}

third_party/blink/renderer/core/paint/inline_text_box_painter.cc

@@ -127,16 +127,11 @@ void InlineTextBoxPainter::Paint(const PaintInfo& paint_info,
       (inline_text_box_.IsHorizontal() ? paint_offset.X() : paint_offset.Y());
   LayoutUnit logical_extent = logical_visual_overflow.Width();
 
-  // We round the y-axis to ensure consistent line heights.
-  LayoutPoint adjusted_paint_offset(paint_offset);
-
   if (inline_text_box_.IsHorizontal()) {
-    adjusted_paint_offset.SetY(LayoutUnit(adjusted_paint_offset.Y().Round()));
     if (!paint_info.GetCullRect().IntersectsHorizontalRange(
             logical_start, logical_start + logical_extent))
       return;
   } else {
-    adjusted_paint_offset.SetX(LayoutUnit(adjusted_paint_offset.X().Round()));
     if (!paint_info.GetCullRect().IntersectsVerticalRange(
             logical_start, logical_start + logical_extent))
       return;
@@ -173,6 +168,7 @@ void InlineTextBoxPainter::Paint(const PaintInfo& paint_info,
 
   LayoutPoint box_origin(inline_text_box_.PhysicalLocation() + paint_offset);
 
+  // We round the y-axis to ensure consistent line heights.
   if (inline_text_box_.IsHorizontal()) {
     box_origin.SetY(LayoutUnit(box_origin.Y().Round()));
   } else {