Bug 667485 - Add windows' document size to windows size. r=jst

content/base/public/nsIDocument.h

@@ -1534,6 +1534,10 @@ public:
 #undef DEPRECATED_OPERATION
   void WarnOnceAbout(DeprecatedOperations aOperation);
 
+  PRInt64 SizeOf() const {
+    return sizeof(*this);
+  }
+
 private:
   PRUint32 mWarnedAbout;
 

dom/base/nsGlobalWindow.h

@@ -545,7 +545,13 @@ public:
   }
 
   PRInt64 SizeOf() const {
-    return sizeof(*this);
+    PRInt64 size = sizeof(*this);
+
+    if (IsInnerWindow() && mDoc) {
+      size += mDoc->SizeOf();
+    }
+
+    return size;
   }
 
 private: