Have Range constructor take a Document reference in argument

Source/core/editing/TextCheckingHelper.cpp

Index: Source/core/editing/TextCheckingHelper.cpp
diff --git a/Source/core/editing/TextCheckingHelper.cpp b/Source/core/editing/TextCheckingHelper.cpp
index 63aae0c0e28cb6660a562f456f734f5145477b56..33471b3344e82a97f8d8645b322b6558efee70d0 100644
--- a/Source/core/editing/TextCheckingHelper.cpp
+++ b/Source/core/editing/TextCheckingHelper.cpp
@@ -181,7 +181,7 @@ PassRefPtr<Range> TextCheckingParagraph::offsetAsRange() const
 {
     ASSERT(m_checkingRange);
     if (!m_offsetAsRange)
-        m_offsetAsRange = Range::create(&paragraphRange()->startContainer()->document(), paragraphRange()->startPosition(), checkingRange()->startPosition());
+        m_offsetAsRange = Range::create(paragraphRange()->startContainer()->document(), paragraphRange()->startPosition(), checkingRange()->startPosition());
 
     return m_offsetAsRange;
 }
@@ -310,7 +310,7 @@ String TextCheckingHelper::findFirstMisspellingOrBadGrammar(bool checkGrammar, b
     int totalRangeLength = TextIterator::rangeLength(paragraphRange.get());
     setEnd(paragraphRange.get(), endOfParagraph(m_range->startPosition()));
 
-    RefPtr<Range> offsetAsRange = Range::create(&paragraphRange->startContainer()->document(), paragraphRange->startPosition(), m_range->startPosition());
+    RefPtr<Range> offsetAsRange = Range::create(paragraphRange->startContainer()->document(), paragraphRange->startPosition(), m_range->startPosition());
     int rangeStartOffset = TextIterator::rangeLength(offsetAsRange.get());
     int totalLengthProcessed = 0;
 
@@ -324,7 +324,7 @@ String TextCheckingHelper::findFirstMisspellingOrBadGrammar(bool checkGrammar, b
         if (inSameParagraph(paragraphRange->startPosition(), m_range->endPosition())) {
             // Determine the character offset from the end of the original search range to the end of the paragraph,
             // since we will want to ignore results in this area.
-            RefPtr<Range> endOffsetAsRange = Range::create(&paragraphRange->startContainer()->document(), paragraphRange->startPosition(), m_range->endPosition());
+            RefPtr<Range> endOffsetAsRange = Range::create(paragraphRange->startContainer()->document(), paragraphRange->startPosition(), m_range->endPosition());
             currentEndOffset = TextIterator::rangeLength(endOffsetAsRange.get());
             lastIteration = true;
         }
@@ -377,7 +377,7 @@ String TextCheckingHelper::findFirstMisspellingOrBadGrammar(bool checkGrammar, b
                 if (!misspelledWord.isEmpty() && (!checkGrammar || badGrammarPhrase.isEmpty() || spellingLocation <= grammarDetailLocation)) {
                     int spellingOffset = spellingLocation - currentStartOffset;
                     if (!firstIteration) {
-                        RefPtr<Range> paragraphOffsetAsRange = Range::create(&paragraphRange->startContainer()->document(), m_range->startPosition(), paragraphRange->startPosition());
+                        RefPtr<Range> paragraphOffsetAsRange = Range::create(paragraphRange->startContainer()->document(), m_range->startPosition(), paragraphRange->startPosition());
                         spellingOffset += TextIterator::rangeLength(paragraphOffsetAsRange.get());
                     }
                     outIsSpelling = true;
@@ -388,7 +388,7 @@ String TextCheckingHelper::findFirstMisspellingOrBadGrammar(bool checkGrammar, b
                 if (checkGrammar && !badGrammarPhrase.isEmpty()) {
                     int grammarPhraseOffset = grammarPhraseLocation - currentStartOffset;
                     if (!firstIteration) {
-                        RefPtr<Range> paragraphOffsetAsRange = Range::create(&paragraphRange->startContainer()->document(), m_range->startPosition(), paragraphRange->startPosition());
+                        RefPtr<Range> paragraphOffsetAsRange = Range::create(paragraphRange->startContainer()->document(), m_range->startPosition(), paragraphRange->startPosition());
                         grammarPhraseOffset += TextIterator::rangeLength(paragraphOffsetAsRange.get());
                     }
                     outIsSpelling = false;
@@ -525,11 +525,8 @@ bool TextCheckingHelper::unifiedTextCheckerEnabled() const
     if (!m_range)
         return false;
 
-    Document* doc = m_range->ownerDocument();
-    if (!doc)
-        return false;
-
-    return WebCore::unifiedTextCheckerEnabled(doc->frame());
+    Document& doc = m_range->ownerDocument();
+    return WebCore::unifiedTextCheckerEnabled(doc.frame());
 }
 
 void checkTextOfParagraph(TextCheckerClient& client, const String& text, TextCheckingTypeMask checkingTypes, Vector<TextCheckingResult>& results)