#33557 (background-color: inherit on html:input type="text" only appears to check for background color on parent node). MapDeclarationColorInto() should inherit the parent's color on "background: transparent".

content/html/style/src/nsCSSStyleRule.cpp

@@ -1726,6 +1726,7 @@ MapDeclarationColorInto(nsICSSDeclaration* aDeclaration,
         color->mBackgroundFlags &= ~NS_STYLE_BG_COLOR_TRANSPARENT;
       }
       else if (eCSSUnit_Enumerated == ourColor->mBackColor.GetUnit()) {
+        color->mBackgroundColor = parentColor->mBackgroundColor;
         color->mBackgroundFlags |= NS_STYLE_BG_COLOR_TRANSPARENT;
       }
 

layout/html/style/src/nsCSSStyleRule.cpp

@@ -1726,6 +1726,7 @@ MapDeclarationColorInto(nsICSSDeclaration* aDeclaration,
         color->mBackgroundFlags &= ~NS_STYLE_BG_COLOR_TRANSPARENT;
       }
       else if (eCSSUnit_Enumerated == ourColor->mBackColor.GetUnit()) {
+        color->mBackgroundColor = parentColor->mBackgroundColor;
         color->mBackgroundFlags |= NS_STYLE_BG_COLOR_TRANSPARENT;
       }
 

layout/style/nsCSSStyleRule.cpp

@@ -1726,6 +1726,7 @@ MapDeclarationColorInto(nsICSSDeclaration* aDeclaration,
         color->mBackgroundFlags &= ~NS_STYLE_BG_COLOR_TRANSPARENT;
       }
       else if (eCSSUnit_Enumerated == ourColor->mBackColor.GetUnit()) {
+        color->mBackgroundColor = parentColor->mBackgroundColor;
         color->mBackgroundFlags |= NS_STYLE_BG_COLOR_TRANSPARENT;
       }