blink: Add backdrop-filter support

Source/core/style/ComputedStyle.h

Index: Source/core/style/ComputedStyle.h
diff --git a/Source/core/style/ComputedStyle.h b/Source/core/style/ComputedStyle.h
index e8f1dd447b7c3da63b8cea7aa1f136bd3b89779c..0cf7e65eebd8b7054e17e42887f94e3d30ab7f4e 100644
--- a/Source/core/style/ComputedStyle.h
+++ b/Source/core/style/ComputedStyle.h
@@ -922,12 +922,14 @@ public:
     bool hasCurrentOpacityAnimation() const { return rareNonInheritedData->m_hasCurrentOpacityAnimation; }
     bool hasCurrentTransformAnimation() const { return rareNonInheritedData->m_hasCurrentTransformAnimation; }
     bool hasCurrentFilterAnimation() const { return rareNonInheritedData->m_hasCurrentFilterAnimation; }
-    bool shouldCompositeForCurrentAnimations() const { return hasCurrentOpacityAnimation() || hasCurrentTransformAnimation() || hasCurrentFilterAnimation(); }
+    bool hasCurrentBackdropFilterAnimation() const { return rareNonInheritedData->m_hasCurrentBackdropFilterAnimation; }
+    bool shouldCompositeForCurrentAnimations() const { return hasCurrentOpacityAnimation() || hasCurrentTransformAnimation() || hasCurrentFilterAnimation() || hasCurrentBackdropFilterAnimation(); }
 
     bool isRunningOpacityAnimationOnCompositor() const { return rareNonInheritedData->m_runningOpacityAnimationOnCompositor; }
     bool isRunningTransformAnimationOnCompositor() const { return rareNonInheritedData->m_runningTransformAnimationOnCompositor; }
     bool isRunningFilterAnimationOnCompositor() const { return rareNonInheritedData->m_runningFilterAnimationOnCompositor; }
-    bool isRunningAnimationOnCompositor() const { return isRunningOpacityAnimationOnCompositor() || isRunningTransformAnimationOnCompositor() || isRunningFilterAnimationOnCompositor(); }
+    bool isRunningBackdropFilterAnimationOnCompositor() const { return rareNonInheritedData->m_runningBackdropFilterAnimationOnCompositor; }
+    bool isRunningAnimationOnCompositor() const { return isRunningOpacityAnimationOnCompositor() || isRunningTransformAnimationOnCompositor() || isRunningFilterAnimationOnCompositor() || isRunningBackdropFilterAnimationOnCompositor(); }
 
     LineBoxContain lineBoxContain() const { return rareInheritedData->m_lineBoxContain; }
     const LineClampValue& lineClamp() const { return rareNonInheritedData->lineClamp; }
@@ -947,6 +949,10 @@ public:
     const FilterOperations& filter() const { return rareNonInheritedData->m_filter->m_operations; }
     bool hasFilter() const { return !rareNonInheritedData->m_filter->m_operations.operations().isEmpty(); }
 
+    FilterOperations& mutableBackdropFilter() { return rareNonInheritedData.access()->m_backdropFilter.access()->m_operations; }
+    const FilterOperations& backdropFilter() const { return rareNonInheritedData->m_backdropFilter->m_operations; }
+    bool hasBackdropFilter() const { return !rareNonInheritedData->m_backdropFilter->m_operations.operations().isEmpty(); }
+
     WebBlendMode blendMode() const { return static_cast<WebBlendMode>(rareNonInheritedData->m_effectiveBlendMode); }
     void setBlendMode(WebBlendMode v) { rareNonInheritedData.access()->m_effectiveBlendMode = v; }
     bool hasBlendMode() const { return blendMode() != WebBlendModeNormal; }
@@ -1378,6 +1384,7 @@ public:
     void setRubyPosition(RubyPosition position) { SET_VAR(rareInheritedData, m_rubyPosition, position); }
 
     void setFilter(const FilterOperations& ops) { SET_VAR(rareNonInheritedData.access()->m_filter, m_operations, ops); }
+    void setBackdropFilter(const FilterOperations& ops) { SET_VAR(rareNonInheritedData.access()->m_backdropFilter, m_operations, ops); }
 
     void setTabSize(TabSize size) { SET_VAR(rareInheritedData, m_tabSize, size); }
 
@@ -1404,10 +1411,12 @@ public:
     void setHasCurrentOpacityAnimation(bool b = true) { SET_VAR(rareNonInheritedData, m_hasCurrentOpacityAnimation, b); }
     void setHasCurrentTransformAnimation(bool b = true) { SET_VAR(rareNonInheritedData, m_hasCurrentTransformAnimation, b); }
     void setHasCurrentFilterAnimation(bool b = true) { SET_VAR(rareNonInheritedData, m_hasCurrentFilterAnimation, b); }
+    void setHasCurrentBackdropFilterAnimation(bool b = true) { SET_VAR(rareNonInheritedData, m_hasCurrentBackdropFilterAnimation, b); }
 
     void setIsRunningOpacityAnimationOnCompositor(bool b = true) { SET_VAR(rareNonInheritedData, m_runningOpacityAnimationOnCompositor, b); }
     void setIsRunningTransformAnimationOnCompositor(bool b = true) { SET_VAR(rareNonInheritedData, m_runningTransformAnimationOnCompositor, b); }
     void setIsRunningFilterAnimationOnCompositor(bool b = true) { SET_VAR(rareNonInheritedData, m_runningFilterAnimationOnCompositor, b); }
+    void setIsRunningBackdropFilterAnimationOnCompositor(bool b = true) { SET_VAR(rareNonInheritedData, m_runningBackdropFilterAnimationOnCompositor, b); }
 
     void setLineBoxContain(LineBoxContain c) { SET_VAR(rareInheritedData, m_lineBoxContain, c); }
     void setLineClamp(LineClampValue c) { SET_VAR(rareNonInheritedData, lineClamp, c); }
@@ -1747,8 +1756,10 @@ public:
     static Color initialTapHighlightColor();
 #if ENABLE(OILPAN)
     static const FilterOperations& initialFilter();
+    static const FilterOperations& initialBackdropFilter();
 #else
     static const FilterOperations& initialFilter() { DEFINE_STATIC_LOCAL(FilterOperations, ops, ()); return ops; }
+    static const FilterOperations& initialBackdropFilter() { DEFINE_STATIC_LOCAL(FilterOperations, ops, ()); return ops; }
 #endif
     static WebBlendMode initialBlendMode() { return WebBlendModeNormal; }
     static EIsolation initialIsolation() { return IsolationAuto; }