Remove deadcode from core/paint classes

Remove LineBoxListPainter::InvalidateLineBoxPaintOffsets
Deadcode from https://crrev.com/9200103f3f0c21d9bd88c669159a43097ba185ed

Remove InlineTextBoxPainter::PaintCompositionBackgrounds
Deadcode from https://crrev.com/81808f5a2947e0a2c6d895fe59438ac7e3af04c8

Remove BoxPainter::IsFillLayerOpaque
Deadcode from https://crrev.com/e3ab046fcbe969bd1b38a0361f7d583998365c2c

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: Icfa5df530d09bbb13aed0946f6bb2c114027ada7
Reviewed-on: https://chromium-review.googlesource.com/530038Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#478711}

third_party/WebKit/Source/core/paint/BoxPainter.h

@@ -39,10 +39,6 @@ class BoxPainter : public BoxPainterBase {
   void PaintMask(const PaintInfo&, const LayoutPoint&);
   void PaintClippingMask(const PaintInfo&, const LayoutPoint&);
 
-  // Returns true if the fill layer will certainly occlude anything painted
-  // behind it.
-  static bool IsFillLayerOpaque(const FillLayer&, const LayoutObject&);
-
   void PaintFillLayers(const PaintInfo&,
                        const Color&,
                        const FillLayer&,

third_party/WebKit/Source/core/paint/InlineTextBoxPainter.h

@@ -62,11 +62,6 @@ class InlineTextBoxPainter {
  private:
   enum class PaintOptions { kNormal, kCombinedText };
 
-  void PaintCompositionBackgrounds(GraphicsContext&,
-                                   const LayoutPoint& box_origin,
-                                   const ComputedStyle&,
-                                   const Font&,
-                                   bool use_custom_underlines);
   void PaintSingleCompositionBackgroundRun(GraphicsContext&,
                                            const LayoutPoint& box_origin,
                                            const ComputedStyle&,

third_party/WebKit/Source/core/paint/LineBoxListPainter.cpp

@@ -77,29 +77,4 @@ void LineBoxListPainter::Paint(const LayoutBoxModelObject& layout_object,
   }
 }
 
-static void InvalidateLineBoxPaintOffsetsInternal(
-    PaintController& paint_controller,
-    InlineFlowBox* inline_box) {
-#if 0
-    // TODO(wangxianzhu): Implement this with PaintInvalidator.
-    paintController.invalidatePaintOffset(*inlineBox);
-    for (InlineBox* child = inlineBox->firstChild(); child; child = child->nextOnLine()) {
-        if (!child->getLineLayoutItem().isText() && child->boxModelObject().hasSelfPaintingLayer())
-            continue;
-        if (child->isInlineFlowBox())
-            invalidateLineBoxPaintOffsetsInternal(paintController, toInlineFlowBox(child));
-        else
-            paintController.invalidatePaintOffset(*child);
-    }
-#endif
-}
-
-void LineBoxListPainter::InvalidateLineBoxPaintOffsets(
-    const PaintInfo& paint_info) const {
-  PaintController& paint_controller = paint_info.context.GetPaintController();
-  for (InlineFlowBox* curr = line_box_list_.FirstLineBox(); curr;
-       curr = curr->NextLineBox())
-    InvalidateLineBoxPaintOffsetsInternal(paint_controller, curr);
-}
-
 }  // namespace blink

third_party/WebKit/Source/core/paint/LineBoxListPainter.h

@@ -26,8 +26,6 @@ class LineBoxListPainter {
              const PaintInfo&,
              const LayoutPoint&) const;
 
-  void InvalidateLineBoxPaintOffsets(const PaintInfo&) const;
-
  private:
   const LineBoxList& line_box_list_;
 };

third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositor.cpp

@@ -104,14 +104,6 @@ class PaintArtifactCompositor::ContentLayerClientImpl
       CcLayersRasterInvalidationTrackingMap().Remove(cc_picture_layer_.get());
   }
 
-  bool HasTrackedRasterInvalidations() const {
-    RasterInvalidationTracking* tracking =
-        CcLayersRasterInvalidationTrackingMap().Find(cc_picture_layer_.get());
-    if (tracking)
-      return !tracking->invalidations.IsEmpty();
-    return false;
-  }
-
   RasterInvalidationTracking& EnsureRasterInvalidationTracking() {
     return CcLayersRasterInvalidationTrackingMap().Add(cc_picture_layer_.get());
   }
@@ -184,14 +176,6 @@ void PaintArtifactCompositor::ResetTrackedRasterInvalidations() {
     client->ResetTrackedRasterInvalidations();
 }
 
-bool PaintArtifactCompositor::HasTrackedRasterInvalidations() const {
-  for (auto& client : content_layer_clients_) {
-    if (client->HasTrackedRasterInvalidations())
-      return true;
-  }
-  return false;
-}
-
 std::unique_ptr<JSONObject> PaintArtifactCompositor::LayersAsJSON(
     LayerTreeFlags flags) const {
   std::unique_ptr<JSONArray> layers_json = JSONArray::Create();