Create PaintChunk and begin writing code to build paint chunks.

third_party/WebKit/Source/platform/blink_platform.gypi

Index: third_party/WebKit/Source/platform/blink_platform.gypi
diff --git a/third_party/WebKit/Source/platform/blink_platform.gypi b/third_party/WebKit/Source/platform/blink_platform.gypi
index 2a8a406a455f37e2fd1fe24e1499d7da1f187f43..4d46be2b33c0285304de6854ca35ccf749c2be4e 100644
--- a/third_party/WebKit/Source/platform/blink_platform.gypi
+++ b/third_party/WebKit/Source/platform/blink_platform.gypi
@@ -683,6 +683,10 @@
       'graphics/paint/FixedPositionDisplayItem.h',
       'graphics/paint/FloatClipDisplayItem.cpp',
       'graphics/paint/FloatClipDisplayItem.h',
+      'graphics/paint/PaintChunk.h',
+      'graphics/paint/PaintChunker.cpp',
+      'graphics/paint/PaintChunker.h',
+      'graphics/paint/PaintProperties.h',
       'graphics/paint/ScrollDisplayItem.cpp',
       'graphics/paint/ScrollDisplayItem.h',
       'graphics/paint/SkPictureBuilder.h',
@@ -993,6 +997,7 @@
       'graphics/paint/DisplayItemPropertyTreeBuilderTest.cpp',
       'graphics/paint/DisplayItemListTest.cpp',
       'graphics/paint/DisplayItemTest.cpp',
+      'graphics/paint/PaintChunkerTest.cpp',
       'image-decoders/FastSharedBufferReaderTest.cpp',
       'image-decoders/ImageDecoderTest.cpp',
       'mac/VersionUtilMacTest.mm',
@@ -1050,6 +1055,8 @@
     'platform_test_support_files': [
       'testing/GeometryPrinters.cpp',
       'testing/GeometryPrinters.h',
+      'testing/PaintPrinters.cpp',
+      'testing/PaintPrinters.h',
     ],
     'conditions': [
       ['OS=="win"',