Compute effective touch action in StyleAdjuster.

third_party/WebKit/Source/core/style/ComputedStyle.h

Index: third_party/WebKit/Source/core/style/ComputedStyle.h
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.h b/third_party/WebKit/Source/core/style/ComputedStyle.h
index f92778921737c5718bc1a4e24fd13821faba285d..0cd8c401a5390262cbd0c5ae17d4b8b044fcc151 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.h
@@ -1518,9 +1518,16 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase<ComputedStyle>,
   TouchAction GetTouchAction() const {
     return static_cast<TouchAction>(rare_non_inherited_data_->touch_action_);
   }
+  TouchAction GetEffectiveTouchAction() const {
+    return static_cast<TouchAction>(
+        rare_inherited_data_->effective_touch_action_);
+  }
   void SetTouchAction(TouchAction t) {
     SET_VAR(rare_non_inherited_data_, touch_action_, t);
   }
+  void SetEffectiveTouchAction(TouchAction t) {
+    SET_VAR(rare_inherited_data_, effective_touch_action_, t);
+  }
 
   // vertical-align
   static EVerticalAlign InitialVerticalAlign() {
@@ -3010,6 +3017,24 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase<ComputedStyle>,
            OverflowY() == EOverflow::kWebkitPagedY;
   }
 
+  bool IsDisplayTableRowOrColumnType() const {
+    return Display() == EDisplay::kTableRow ||
+           Display() == EDisplay::kTableRowGroup ||
+           Display() == EDisplay::kTableColumn ||
+           Display() == EDisplay::kTableColumnGroup;
+  }
+
+  bool ScrollsOverflow() const {
+    bool overflow_x = OverflowX() == EOverflow::kScroll ||
+                      OverflowX() == EOverflow::kAuto ||
+                      OverflowX() == EOverflow::kOverlay;
+    bool overflow_y = OverflowY() == EOverflow::kScroll ||
+                      OverflowY() == EOverflow::kAuto ||
+                      OverflowY() == EOverflow::kWebkitPagedY ||
+                      OverflowY() == EOverflow::kOverlay;

[flackr, 2017/06/07 18:21:47]

Can you move the code from HasAutoVerticalScrollbar and
HasAutoHorizontalScrollbar to calls into the ComputedStyle as well and share the
code?

[sunxd, 2017/06/08 19:08:12]

Done.

+    return overflow_x || overflow_y;
+  }
+
   // Visibility utility functions.
   bool VisibleToHitTesting() const {
     return Visibility() == EVisibility::kVisible &&