Add CSS support for Containment

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

Index: third_party/WebKit/Source/core/style/ComputedStyleConstants.h
diff --git a/third_party/WebKit/Source/core/style/ComputedStyleConstants.h b/third_party/WebKit/Source/core/style/ComputedStyleConstants.h
index 14d68311b17f126c16d86b27e5163038205b948e..cdae09ae44d7ca1281f7bb2c1df37c8d25da3842 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyleConstants.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyleConstants.h
@@ -485,6 +485,17 @@ inline TouchAction& operator&= (TouchAction& a, TouchAction b) { return a = a &
 
 enum EIsolation { IsolationAuto, IsolationIsolate };
 
+static const size_t EContainBits = 3;

[Timothy Loh, 2015/12/02 02:49:47]

I don't think the E prefix is the current style.

[leviw_travelin_and_unemployed, 2015/12/03 00:01:59]

Changed. The style code is sadly quite inconsistent on this particular issue :(

+enum EContain {
+    ContainsNone = 0x0,
+    ContainsLayout = 0x1,
+    ContainsStyle = 0x2,
+    ContainsPaint = 0x4,
+    ContainsStrict = 0x7

[alancutter (OOO until 2018), 2015/12/02 02:48:17]

I wonder if we're allowed to use 0b111.

[leviw_travelin_and_unemployed, 2015/12/03 00:02:00]

I didn't try, but I changed it to ContainsStrict = ContainsLayout |
ContainsStyle | ContainsPaint, which I think is better.

+};
+inline EContain operator| (EContain a, EContain b) { return EContain(int(a) | int(b)); }
+inline EContain& operator|= (EContain& a, EContain b) { return a = a | b; }
+
 enum ItemPosition {
     ItemPositionAuto,
     ItemPositionStretch,