bug 682247 - telemetry for deprocated IAccessibleTable interface r=surkov

accessible/src/base/Statistics.h

@@ -55,6 +55,12 @@ namespace statistics {
   inline void ISimpleDOMUsed()
     { Telemetry::Accumulate(Telemetry::ISIMPLE_DOM_USAGE, 1); }
 
+  /**
+   * Report that IAccessibleTable has been used.
+   */
+  inline void IAccessibleTableUsed()
+    { Telemetry::Accumulate(Telemetry::IACCESSIBLE_TABLE_USAGE, 1); }
+
 } // namespace statistics
 } // namespace a11y
 } // namespace mozilla

accessible/src/msaa/CAccessibleTable.cpp

@@ -49,10 +49,13 @@
 #include "nsIWinAccessNode.h"
 #include "nsAccessNodeWrap.h"
 #include "nsWinUtils.h"
+#include "Statistics.h"
 
 #include "nsCOMPtr.h"
 #include "nsString.h"
 
+using namespace mozilla::a11y;
+
 #define CANT_QUERY_ASSERTION_MSG \
 "Subclass of CAccessibleTable doesn't implement nsIAccessibleTable"\
 
@@ -64,6 +67,7 @@ CAccessibleTable::QueryInterface(REFIID iid, void** ppv)
   *ppv = NULL;
 
   if (IID_IAccessibleTable == iid) {
+    statistics::IAccessibleTableUsed();
     *ppv = static_cast<IAccessibleTable*>(this);
     (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
     return S_OK;

toolkit/components/telemetry/TelemetryHistograms.h

@@ -54,6 +54,7 @@
  */
 HISTOGRAM(A11Y_INSTANTIATED, 0, 1, 2, BOOLEAN, "has accessibility support been instantiated")
 HISTOGRAM(ISIMPLE_DOM_USAGE, 0, 1, 2, BOOLEAN, "have the ISimpleDOM* accessibility interfaces been used")
+HISTOGRAM(IACCESSIBLE_TABLE_USAGE, 0, 1, 2, BOOLEAN, "has the IAccessibleTable accessibility interface been used")
 
 HISTOGRAM(CYCLE_COLLECTOR, 1, 10000, 50, EXPONENTIAL, "Time spent on one cycle collection (ms)")
 HISTOGRAM(CYCLE_COLLECTOR_VISITED_REF_COUNTED, 1, 300000, 50, EXPONENTIAL, "Number of ref counted objects visited by the cycle collector")