Bug 966485 - Remove telemetry bucket for FENNEC_STARTUP_TIME_ABOUTHOME. r=rnewman, r=margaret

mobile/android/base/BrowserApp.java

@@ -181,7 +181,6 @@ public class BrowserApp extends GeckoApp
     private HomePager mHomePager;
     private TabsPanel mTabsPanel;
     private ViewGroup mHomePagerContainer;
-    protected Telemetry.Timer mAboutHomeStartupTimer;
     private ActionModeCompat mActionMode;
     private boolean mHideDynamicToolbarOnActionModeEnd;
     private TabHistoryController tabHistoryController;
@@ -657,8 +656,6 @@ public class BrowserApp extends GeckoApp
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
-        mAboutHomeStartupTimer = new Telemetry.UptimeTimer("FENNEC_STARTUP_TIME_ABOUTHOME");
-
         final Intent intent = getIntent();
 
         // Note that we're calling GeckoProfile.get *before GeckoApp.onCreate*.
@@ -1378,16 +1375,6 @@ public class BrowserApp extends GeckoApp
         Telemetry.sendUIEvent(TelemetryContract.Event.SHARE, TelemetryContract.Method.LIST);
     }
 
-    @Override
-    protected void loadStartupTab(String url, int flags) {
-        // We aren't showing about:home, so cancel the telemetry timer
-        if (url != null || mShouldRestore) {
-            mAboutHomeStartupTimer.cancel();
-        }
-
-        super.loadStartupTab(url, flags);
-    }
-
     private void setToolbarMargin(int margin) {
         ((RelativeLayout.LayoutParams) mGeckoLayout.getLayoutParams()).topMargin = margin;
         mGeckoLayout.requestLayout();

toolkit/components/telemetry/Histograms.json

@@ -4532,15 +4532,6 @@
     "description": "The way the GeckoApp was launched. (Normal, URL, Prefetch, Redirector)",
     "cpp_guard": "ANDROID"
   },
-  "FENNEC_STARTUP_TIME_ABOUTHOME": {
-    "expires_in_version": "never",
-    "kind": "exponential",
-    "low": 100,
-    "high": "10000",
-    "n_buckets": 20,
-    "description": "Time for the about:home page to be displayed (ms)",
-    "cpp_guard": "ANDROID"
-  },
   "FENNEC_STARTUP_TIME_GECKOREADY": {
     "expires_in_version": "never",
     "kind": "exponential",