Bug 1936822 - Remove unused A11Y_ flag histograms r=morgan

Differential Revision: https://phabricator.services.mozilla.com/D231948

accessible/base/Statistics.h

@@ -13,28 +13,10 @@ namespace mozilla {
 namespace a11y {
 namespace statistics {
 
-inline void A11yInitialized() {
-  Telemetry::Accumulate(Telemetry::A11Y_INSTANTIATED_FLAG, true);
-}
-
 inline void A11yConsumers(uint32_t aConsumer) {
   Telemetry::Accumulate(Telemetry::A11Y_CONSUMERS, aConsumer);
 }
 
-/**
- * Report that ISimpleDOM* has been used.
- */
-inline void ISimpleDOMUsed() {
-  Telemetry::Accumulate(Telemetry::A11Y_ISIMPLEDOM_USAGE_FLAG, true);
-}
-
-/**
- * Report that IAccessibleTable has been used.
- */
-inline void IAccessibleTableUsed() {
-  Telemetry::Accumulate(Telemetry::A11Y_IATABLE_USAGE_FLAG, true);
-}
-
 }  // namespace statistics
 }  // namespace a11y
 }  // namespace mozilla

accessible/base/nsAccessibilityService.cpp

@@ -40,7 +40,6 @@
 #  include "RootAccessibleWrap.h"
 #endif
 #include "States.h"
-#include "Statistics.h"
 #include "TextLeafAccessible.h"
 #include "xpcAccessibleApplication.h"
 
@@ -1592,8 +1591,6 @@ bool nsAccessibilityService::Init(uint64_t aCacheDomains) {
   // domains that we activate based on information about the instantiator.
   gCacheDomains = ::GetCacheDomainsForKnownClients(aCacheDomains);
 
-  statistics::A11yInitialized();
-
   static const char16_t kInitIndicator[] = {'1', 0};
   observerService->NotifyObservers(nullptr, "a11y-init-or-shutdown",
                                    kInitIndicator);

accessible/windows/ia2/ia2AccessibleTable.cpp

@@ -16,7 +16,6 @@
 #include "mozilla/a11y/TableAccessible.h"
 #include "nsCOMPtr.h"
 #include "nsString.h"
-#include "Statistics.h"
 
 using namespace mozilla::a11y;
 
@@ -34,7 +33,6 @@ ia2AccessibleTable::QueryInterface(REFIID iid, void** ppv) {
   *ppv = nullptr;
 
   if (IID_IAccessibleTable == iid) {
-    statistics::IAccessibleTableUsed();
     *ppv = static_cast<IAccessibleTable*>(this);
     (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
     return S_OK;

accessible/windows/msaa/MsaaAccessible.cpp

@@ -27,7 +27,6 @@
 #include "sdnTextAccessible.h"
 #include "HyperTextAccessible-inl.h"
 #include "ServiceProvider.h"
-#include "Statistics.h"
 #include "ARIAMap.h"
 #include "mozilla/PresShell.h"
 
@@ -564,7 +563,6 @@ MsaaAccessible::QueryInterface(REFIID iid, void** ppv) {
 
     *ppv = static_cast<ISimpleDOMNode*>(new sdnAccessible(WrapNotNull(this)));
   } else if (iid == IID_ISimpleDOMText && localAcc && localAcc->IsTextLeaf()) {
-    statistics::ISimpleDOMUsed();
     *ppv = static_cast<ISimpleDOMText*>(new sdnTextAccessible(this));
     static_cast<IUnknown*>(*ppv)->AddRef();
     return S_OK;

accessible/windows/msaa/MsaaDocAccessible.cpp

@@ -12,7 +12,6 @@
 #include "nsAccessibilityService.h"
 #include "nsAccUtils.h"
 #include "nsWinUtils.h"
-#include "Statistics.h"
 #include "sdnDocAccessible.h"
 #include "mozilla/a11y/Role.h"
 #include "ISimpleDOM.h"
@@ -54,7 +53,6 @@ MsaaDocAccessible* MsaaDocAccessible::GetFromOwned(Accessible* aAcc) {
 // IUnknown
 IMPL_IUNKNOWN_QUERY_HEAD(MsaaDocAccessible)
 if (aIID == IID_ISimpleDOMDocument && LocalAcc()) {
-  statistics::ISimpleDOMUsed();
   *aInstancePtr = static_cast<ISimpleDOMDocument*>(new sdnDocAccessible(this));
   static_cast<IUnknown*>(*aInstancePtr)->AddRef();
   return S_OK;

toolkit/components/telemetry/Histograms.json

@@ -1,14 +1,4 @@
 {
-  "A11Y_INSTANTIATED_FLAG": {
-    "record_in_processes": ["main"],
-    "products": ["firefox", "fennec"],
-    "expires_in_version": "never",
-    "kind": "flag",
-    "releaseChannelCollection": "opt-out",
-    "bug_numbers": [1382820],
-    "description": "Flag indicating accessibility support has been instantiated.",
-    "alert_emails": ["accessibility@mozilla.com"]
-  },
   "A11Y_CONSUMERS": {
     "record_in_processes": ["main"],
     "products": ["firefox", "fennec"],
@@ -20,22 +10,6 @@
     "description": "A list of known accessibility clients that inject into Firefox process space (see https://searchfox.org/mozilla-central/source/accessible/windows/msaa/Compatibility.h).",
     "alert_emails": ["accessibility@mozilla.com", "jteh@mozilla.com"]
   },
-  "A11Y_ISIMPLEDOM_USAGE_FLAG": {
-    "record_in_processes": ["main"],
-    "products": ["firefox", "fennec"],
-    "expires_in_version": "default",
-    "kind": "flag",
-    "description": "Flag indicating the ISimpleDOM* accessibility interfaces has been used.",
-    "alert_emails": ["accessibility@mozilla.com"]
-  },
-  "A11Y_IATABLE_USAGE_FLAG": {
-    "record_in_processes": ["main"],
-    "products": ["firefox", "fennec"],
-    "expires_in_version": "default",
-    "kind": "flag",
-    "description": "Flag indicating the IAccessibleTable accessibility interface has been used.",
-    "alert_emails": ["accessibility@mozilla.com"]
-  },
   "A11Y_TREE_UPDATE_TIMING_MS": {
     "record_in_processes": ["main", "content"],
     "products": ["firefox", "fennec"],

toolkit/components/telemetry/histogram-allowlists.json

@@ -164,8 +164,6 @@
     "XMLHTTPREQUEST_ASYNC_OR_SYNC"
   ],
   "bug_numbers": [
-    "A11Y_IATABLE_USAGE_FLAG",
-    "A11Y_ISIMPLEDOM_USAGE_FLAG",
     "APPLICATION_REPUTATION_LOCAL",
     "APPLICATION_REPUTATION_SERVER",
     "APPLICATION_REPUTATION_SHOULD_BLOCK",
@@ -603,18 +601,13 @@
     "FX_SESSION_RESTORE_WRITE_FILE_MS",
     "FX_THUMBNAILS_BG_CAPTURE_PAGE_LOAD_TIME_MS",
     "PLACES_BACKUPS_TOJSON_MS",
-    "A11Y_ISIMPLEDOM_USAGE_FLAG",
     "FX_SESSION_RESTORE_MANUAL_RESTORE_DURATION_UNTIL_EAGER_TABS_RESTORED_MS",
     "FX_SESSION_RESTORE_ALL_FILES_CORRUPT",
-    "A11Y_IATABLE_USAGE_FLAG",
     "LOCALDOMSTORAGE_PRELOAD_PENDING_ON_FIRST_ACCESS",
     "PAGE_FAULTS_HARD",
     "GEOLOCATION_WIN8_SOURCE_IS_MLS"
   ],
   "kind": [
-    "A11Y_IATABLE_USAGE_FLAG",
-    "A11Y_INSTANTIATED_FLAG",
-    "A11Y_ISIMPLEDOM_USAGE_FLAG",
     "CANVAS_WEBGL_ACCL_FAILURE_ID",
     "CANVAS_WEBGL_FAILURE_ID",
     "COMPONENTS_SHIM_ACCESSED_BY_CONTENT",