Bug 1818250 - Add ShouldResistFingerprinting to WindowContext. r=nika

Differential Revision: https://phabricator.services.mozilla.com/D172271

docshell/base/WindowContext.cpp

@@ -227,6 +227,12 @@ bool WindowContext::CanSet(FieldIndex<IDX_IsThirdPartyTrackingResourceWindow>,
   return CheckOnlyOwningProcessCanSet(aSource);
 }
 
+bool WindowContext::CanSet(FieldIndex<IDX_ShouldResistFingerprinting>,
+                           const bool& aShouldResistFingerprinting,
+                           ContentParent* aSource) {
+  return CheckOnlyOwningProcessCanSet(aSource);
+}
+
 bool WindowContext::CanSet(FieldIndex<IDX_IsSecureContext>,
                            const bool& aIsSecureContext,
                            ContentParent* aSource) {

docshell/base/WindowContext.h

@@ -51,6 +51,7 @@ class BrowsingContextGroup;
   /* Whether this window's channel has been marked as a third-party      \
    * tracking resource */                                                \
   FIELD(IsThirdPartyTrackingResourceWindow, bool)                        \
+  FIELD(ShouldResistFingerprinting, bool)                                \
   FIELD(IsSecureContext, bool)                                           \
   FIELD(IsOriginalFrameSource, bool)                                     \
   /* Mixed-Content: If the corresponding documentURI is https,           \
@@ -127,6 +128,10 @@ class WindowContext : public nsISupports, public nsWrapperCache {
 
   bool IsLocalIP() const { return GetIsLocalIP(); }
 
+  bool ShouldResistFingerprinting() const {
+    return GetShouldResistFingerprinting();
+  }
+
   nsGlobalWindowInner* GetInnerWindow() const;
   Document* GetDocument() const;
   Document* GetExtantDoc() const;
@@ -261,6 +266,8 @@ class WindowContext : public nsISupports, public nsWrapperCache {
   bool CanSet(FieldIndex<IDX_IsThirdPartyTrackingResourceWindow>,
               const bool& aIsThirdPartyTrackingResourceWindow,
               ContentParent* aSource);
+  bool CanSet(FieldIndex<IDX_ShouldResistFingerprinting>,
+              const bool& aShouldResistFingerprinting, ContentParent* aSource);
   bool CanSet(FieldIndex<IDX_IsSecureContext>, const bool& aIsSecureContext,
               ContentParent* aSource);
   bool CanSet(FieldIndex<IDX_IsOriginalFrameSource>,

dom/chrome-webidl/WindowGlobalActors.webidl

@@ -32,6 +32,8 @@ interface WindowContext {
   // True if the principal of this window is for a local ip address.
   readonly attribute boolean isLocalIP;
 
+  readonly attribute boolean shouldResistFingerprinting;
+
   /**
    * Partially determines whether script execution is allowed in this
    * BrowsingContext. Script execution will be permitted only if this

dom/ipc/WindowGlobalActor.cpp

@@ -100,6 +100,7 @@ WindowGlobalInit WindowGlobalActor::WindowInitializer(
   fields.mIsThirdPartyWindow = doc->HasThirdPartyChannel();
   fields.mIsThirdPartyTrackingResourceWindow =
       nsContentUtils::IsThirdPartyTrackingResourceWindow(aWindow);
+  fields.mShouldResistFingerprinting = doc->ShouldResistFingerprinting();
   fields.mIsSecureContext = aWindow->IsSecureContext();
 
   // Initialze permission fields