Trigger spell check/remove markers if spell checker gets enabled/disabled.

Source/core/editing/SpellChecker.h

Index: Source/core/editing/SpellChecker.h
diff --git a/Source/core/editing/SpellChecker.h b/Source/core/editing/SpellChecker.h
index 44a6b5a5c84d26b41eb3df6048d516b9fe98d584..710e0cbda1f03bbb8045a558ada51615346b44cc 100644
--- a/Source/core/editing/SpellChecker.h
+++ b/Source/core/editing/SpellChecker.h
@@ -46,6 +46,7 @@ class SpellChecker;
 class SpellCheckRequest : public TextCheckingRequest {
 public:
     static PassRefPtr<SpellCheckRequest> create(TextCheckingTypeMask, TextCheckingProcessType, PassRefPtr<Range> checkingRange, PassRefPtr<Range> paragraphRange);
+    static PassRefPtr<SpellCheckRequest> create(TextCheckingTypeMask, TextCheckingProcessType, PassRefPtr<Range> checkingRange, PassRefPtr<Range> paragraphRange, int requestNo);

[tony, 2013/08/12 19:45:15]

resquestNo -> requestNumber.  We don't normally use abbreviations in blink code.

Also, I would merge this with the above create() method and give requestNumber a
default value of 0.

     virtual ~SpellCheckRequest();
 
     PassRefPtr<Range> checkingRange() const { return m_checkingRange; }
@@ -60,14 +61,17 @@ public:
     virtual void didSucceed(const Vector<TextCheckingResult>&) OVERRIDE;
     virtual void didCancel() OVERRIDE;
 
+    int requestNo() { return m_requestNo; }
+
 private:
-    SpellCheckRequest(PassRefPtr<Range> checkingRange, PassRefPtr<Range> paragraphRange, const String&, TextCheckingTypeMask, TextCheckingProcessType, const Vector<uint32_t>& documentMarkersInRange, const Vector<unsigned>& documentMarkerOffsets);
+    SpellCheckRequest(PassRefPtr<Range> checkingRange, PassRefPtr<Range> paragraphRange, const String&, TextCheckingTypeMask, TextCheckingProcessType, const Vector<uint32_t>& documentMarkersInRange, const Vector<unsigned>& documentMarkerOffsets, int requestNo);
 
     SpellChecker* m_checker;
     RefPtr<Range> m_checkingRange;
     RefPtr<Range> m_paragraphRange;
     RefPtr<Element> m_rootEditableElement;
     TextCheckingRequestData m_requestData;
+    int m_requestNo;
 };
 
 class SpellChecker {