Don't apply overflow clips in paint invalidation.

third_party/WebKit/Source/core/layout/LayoutBox.cpp

Index: third_party/WebKit/Source/core/layout/LayoutBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.cpp b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
index 3ac149226ea287ae482c741872f4534cd0e74266..5bdf6ae4ce387f2f9ce805be4c333b4b1b99f119 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
@@ -1025,7 +1025,7 @@ bool LayoutBox::mapScrollingContentsRectToBoxSpace(LayoutRect& rect, ApplyOverfl
     if (!hasClipRelatedProperty())
         return true;
 
-    if (applyOverflowClip == ApplyNonScrollOverflowClip && scrollsOverflow())
+    if (applyOverflowClip == ApplyNonScrollOverflowClip)

[wkorman, 2016/08/26 22:58:03]

In reviewing the docs for this method to make sure we didn't need to update
them, I saw this:

https://cs.chromium.org/chromium/src/third_party/WebKit/Source/core/layout/La...

    // If edgeInclusive is true, then this method may return true even
    // if the resulting rect has zero area.

There is no sign of 'edgeInclusive' except in VisualRectFlags which is not a
part of this method. If this just a totally stale comment maybe remove as part
of this change.

[chrishtr, 2016/08/26 23:05:18]

See line 1041 in the new file.

[wkorman, 2016/08/27 00:32:02]

May have forgotten to add file or upload

         return true;
 
     if (hasOverflowClip()) {