Revamp style resolver stats

Source/core/css/resolver/StyleResolverStats.h

Index: Source/core/css/resolver/StyleResolverStats.h
diff --git a/Source/core/html/ime/Composition.h b/Source/core/css/resolver/StyleResolverStats.h
similarity index 59%
copy from Source/core/html/ime/Composition.h
copy to Source/core/css/resolver/StyleResolverStats.h
index 43054668f0d17b4911e7af24a0db6f0606a7e868..084c02d588bd699e7c7b9fb3ec4e0d167c7800f9 100644
--- a/Source/core/html/ime/Composition.h
+++ b/Source/core/css/resolver/StyleResolverStats.h
@@ -28,36 +28,50 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef Composition_h
-#define Composition_h
+#ifndef StyleResolverStats_h
+#define StyleResolverStats_h
 
-#include "bindings/v8/ScriptWrappable.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-class InputMethodContext;
-
-class Composition : public ScriptWrappable {
+class StyleResolverStats {
 public:
-    static PassOwnPtr<Composition> create(InputMethodContext*);
-    ~Composition();
+    static PassOwnPtr<StyleResolverStats> create()
+    {
+        return adoptPtr(new StyleResolverStats);
+    }
 
-    void ref();
-    void deref();
+    void reset();
+    String report() const;
 
-    String text() const;
-    int selectionStart() const;
-    int selectionEnd() const;
-    const Vector<unsigned>& getSegments() const;
+    unsigned sharedStyleLookups;
+    unsigned sharedStyleCandidates;
+    unsigned sharedStyleFound;
+    unsigned sharedStyleMissed;
+    unsigned sharedStyleRejectedByUncommonAttributeRules;
+    unsigned sharedStyleRejectedBySiblingRules;
+    unsigned sharedStyleRejectedByParent;
+    unsigned matchedPropertyApply;
+    unsigned matchedPropertyCacheHit;
+    unsigned matchedPropertyCacheInheritedHit;
+    unsigned matchedPropertyCacheAdded;
 
-private:
-    explicit Composition(InputMethodContext*);
+    // We keep a separate flag for this since crawling the entire document to print
+    // the number of missed candidates is very slow.
+    bool printMissedCandidateCount;
 
-    InputMethodContext* m_inputMethodContext;
+private:
+    StyleResolverStats()
+        : printMissedCandidateCount(false)
+    {
+        reset();
+    }
 };
 
+#define INCREMENT_STYLE_STATS_COUNTER(resolver, counter) ((resolver).stats() && ++(resolver).stats()-> counter && (resolver).statsTotals()-> counter ++);
+
 } // namespace WebCore
 
-#endif // Composition_h
+#endif // StyleResolverStats_h