Update First Paint to include paint of non-default document background color

third_party/WebKit/Source/platform/graphics/paint/PaintController.h

Index: third_party/WebKit/Source/platform/graphics/paint/PaintController.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/PaintController.h b/third_party/WebKit/Source/platform/graphics/paint/PaintController.h
index 59269deba953ac376ad91d240effa81c7b963865..8aaebc3ed5f38df9e07115a0e92dd14f9956d3b3 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/PaintController.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/PaintController.h
@@ -165,6 +165,13 @@ class PLATFORM_EXPORT PaintController {
   bool imagePainted() const { return m_imagePainted; }
   void setImagePainted() { m_imagePainted = true; }
 
+  bool nonDefaultBackgroundColorPainted() const {
+    return m_nonDefaultBackgroundColorPainted;
+  }
+  void setNonDefaultBackgroundColorPainted() {
+    m_nonDefaultBackgroundColorPainted = true;
+  }
+
   // Returns displayItemList added using createAndAppend() since beginning or
   // the last commitNewDisplayItems(). Use with care.
   DisplayItemList& newDisplayItemList() { return m_newDisplayItemList; }
@@ -195,6 +202,7 @@ class PLATFORM_EXPORT PaintController {
         m_subsequenceCachingDisabled(false),
         m_textPainted(false),
         m_imagePainted(false),
+        m_nonDefaultBackgroundColorPainted(false),
         m_skippingCacheCount(0),
         m_numCachedNewItems(0),
         m_currentCachedSubsequenceBeginIndexInNewList(kNotFound)
@@ -298,6 +306,7 @@ class PLATFORM_EXPORT PaintController {
   // false.
   bool m_textPainted;
   bool m_imagePainted;
+  bool m_nonDefaultBackgroundColorPainted;
 
   int m_skippingCacheCount;