Add most missing blink files to .gn files

third_party/WebKit/Source/core/paint/BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//third_party/WebKit/Source/core/core.gni")
 
 blink_core_sources("paint") {
   split_count = 2
   sources = [
     "BackgroundImageGeometry.cpp",
@@ skipping 58 matching lines @@
     "ImagePainter.cpp",
     "ImagePainter.h",
     "InlineFlowBoxPainter.cpp",
     "InlineFlowBoxPainter.h",
     "InlinePainter.cpp",
     "InlinePainter.h",
     "InlineTextBoxPainter.cpp",
     "InlineTextBoxPainter.h",
     "LayerClipRecorder.cpp",
     "LayerClipRecorder.h",
+    "LayerHitTestRects.h",
     "LayoutObjectDrawingRecorder.h",
     "LineBoxListPainter.cpp",
     "LineBoxListPainter.h",
     "ListItemPainter.cpp",
     "ListItemPainter.h",
     "ListMarkerPainter.cpp",
     "ListMarkerPainter.h",
     "MediaControlsPainter.cpp",
     "MediaControlsPainter.h",
     "MultiColumnSetPainter.cpp",
@@ skipping 29 matching lines @@
     "PaintLayerStackingNode.cpp",
     "PaintLayerStackingNode.h",
     "PaintLayerStackingNodeIterator.cpp",
     "PaintLayerStackingNodeIterator.h",
     "PaintPhase.cpp",
     "PaintPhase.h",
     "PaintPropertyTreeBuilder.cpp",
     "PaintPropertyTreeBuilder.h",
     "PaintPropertyTreePrinter.cpp",
     "PaintPropertyTreePrinter.h",
+    "PaintResult.h",
     "PaintTiming.cpp",
     "PaintTiming.h",
     "PartPainter.cpp",
     "PartPainter.h",
     "PrePaintTreeWalk.cpp",
     "PrePaintTreeWalk.h",
     "ReplacedPainter.cpp",
     "ReplacedPainter.h",
     "RootInlineBoxPainter.cpp",
     "RootInlineBoxPainter.h",
@@ skipping 59 matching lines @@
     "ViewPaintInvalidator.h",
     "ViewPainter.cpp",
     "ViewPainter.h",
   ]
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 }