For #15369: Add synced tabs usage metrics.

app/src/main/java/org/mozilla/fenix/components/metrics/Event.kt

@@ -187,6 +187,8 @@ sealed class Event {
 
     object TabSettingsOpened : Event()
 
+    object SyncedTabOpened : Event()
+
     object RecentlyClosedTabsOpened : Event()
 
     // Interaction events with extras

app/src/main/java/org/mozilla/fenix/components/metrics/GleanMetricsService.kt

@@ -674,6 +674,10 @@ private val Event.wrapper: EventWrapper<*>?
             { ProgressiveWebApp.backgroundKeys.valueOf(it) }
         )
 
+        is Event.SyncedTabOpened -> EventWrapper<NoExtraKeys>(
+            { Events.syncedTabOpened.record(it) }
+        )
+
         is Event.RecentlyClosedTabsOpened -> EventWrapper<NoExtraKeys>(
             { Events.recentlyClosedTabsOpened.record(it) }
         )

app/src/main/java/org/mozilla/fenix/sync/SyncedTabsLayout.kt

@@ -21,6 +21,9 @@ import mozilla.components.browser.storage.sync.Tab
 import mozilla.components.feature.syncedtabs.view.SyncedTabsView
 import org.mozilla.fenix.FeatureFlags
 import org.mozilla.fenix.R
+import org.mozilla.fenix.components.metrics.Event
+import org.mozilla.fenix.components.metrics.MetricController
+import org.mozilla.fenix.ext.components
 import org.mozilla.fenix.sync.ext.toAdapterItem
 import org.mozilla.fenix.sync.ext.toStringRes
 import java.lang.IllegalStateException
@@ -32,8 +35,9 @@ class SyncedTabsLayout @JvmOverloads constructor(
 ) : FrameLayout(context, attrs, defStyleAttr), SyncedTabsView {
 
     override var listener: SyncedTabsView.Listener? = null
+    private val metrics = context.components.analytics.metrics
 
-    private val adapter = SyncedTabsAdapter(ListenerDelegate { listener })
+    private val adapter = SyncedTabsAdapter(ListenerDelegate(metrics) { listener })
     private val coroutineScope = CoroutineScope(Dispatchers.Main)
 
     init {
@@ -110,6 +114,7 @@ class SyncedTabsLayout @JvmOverloads constructor(
  * when we get a null reference, we never get a new binding to the non-null listener.
  */
 class ListenerDelegate(
+    private val metrics: MetricController,
     private val listener: (() -> SyncedTabsView.Listener?)
 ) : SyncedTabsView.Listener {
     override fun onRefresh() {
@@ -118,5 +123,6 @@ class ListenerDelegate(
 
     override fun onTabClicked(tab: Tab) {
         listener.invoke()?.onTabClicked(tab)
+        metrics.track(Event.SyncedTabOpened)
     }
 }

app/src/main/java/org/mozilla/fenix/tabtray/SyncedTabsController.kt

@@ -21,6 +21,7 @@ import mozilla.components.browser.storage.sync.SyncedDeviceTabs
 import mozilla.components.feature.syncedtabs.view.SyncedTabsView
 import mozilla.components.lib.state.ext.flowScoped
 import mozilla.components.support.ktx.kotlinx.coroutines.flow.ifChanged
+import org.mozilla.fenix.components.metrics.MetricController
 import org.mozilla.fenix.sync.ListenerDelegate
 import org.mozilla.fenix.sync.SyncedTabsAdapter
 import org.mozilla.fenix.sync.ext.toAdapterList
@@ -34,11 +35,12 @@ class SyncedTabsController(
     private val view: View,
     store: TabTrayDialogFragmentStore,
     private val concatAdapter: ConcatAdapter,
-    coroutineContext: CoroutineContext = Dispatchers.Main
+    coroutineContext: CoroutineContext = Dispatchers.Main,
+    metrics: MetricController
 ) : SyncedTabsView {
     override var listener: SyncedTabsView.Listener? = null
 
-    val adapter = SyncedTabsAdapter(ListenerDelegate { listener })
+    val adapter = SyncedTabsAdapter(ListenerDelegate(metrics) { listener })
 
     private val scope: CoroutineScope = CoroutineScope(coroutineContext)
 

app/src/main/java/org/mozilla/fenix/tabtray/TabTrayView.kt

@@ -97,9 +97,10 @@ class TabTrayView(
 
     private var tabsTouchHelper: TabsTouchHelper
     private val collectionsButtonAdapter = SaveToCollectionsButtonAdapter(interactor, isPrivate)
+    private val metrics = container.context.components.analytics.metrics
 
     private val syncedTabsController =
-        SyncedTabsController(lifecycleOwner, view, store, concatAdapter)
+        SyncedTabsController(lifecycleOwner, view, store, concatAdapter, metrics = metrics)
     private val syncedTabsFeature = ViewBoundFeatureWrapper<SyncedTabsFeature>()
 
     private var hasLoaded = false

app/src/test/java/org/mozilla/fenix/sync/ListenerDelegateTest.kt

@@ -8,12 +8,16 @@ import io.mockk.mockk
 import io.mockk.verify
 import mozilla.components.feature.syncedtabs.view.SyncedTabsView
 import org.junit.Test
+import org.mozilla.fenix.components.metrics.Event
+import org.mozilla.fenix.components.metrics.MetricController
 
 class ListenerDelegateTest {
     @Test
     fun `delegate invokes nullable listener`() {
         val listener: SyncedTabsView.Listener? = mockk(relaxed = true)
-        val delegate = ListenerDelegate { listener }
+        val metrics: MetricController = mockk(relaxed = true)
+
+        val delegate = ListenerDelegate(metrics) { listener }
 
         delegate.onRefresh()
 
@@ -22,5 +26,6 @@ class ListenerDelegateTest {
         delegate.onTabClicked(mockk())
 
         verify { listener?.onTabClicked(any()) }
+        verify { metrics.track(Event.SyncedTabOpened) }
     }
 }

app/src/test/java/org/mozilla/fenix/tabtray/SyncedTabsControllerTest.kt

@@ -25,6 +25,7 @@ import org.junit.Rule
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.mozilla.fenix.R
+import org.mozilla.fenix.components.metrics.MetricController
 import org.mozilla.fenix.helpers.FenixRobolectricTestRunner
 import org.mozilla.fenix.sync.SyncedTabsViewHolder
 import org.mozilla.fenix.tabtray.TabTrayDialogFragmentAction.EnterMultiSelectMode
@@ -65,8 +66,9 @@ class SyncedTabsControllerTest {
         )
 
         view = LayoutInflater.from(testContext).inflate(R.layout.about_list_item, null)
+        val metrics: MetricController = mockk()
         controller =
-            SyncedTabsController(lifecycleOwner, view, store, concatAdapter, coroutineContext)
+            SyncedTabsController(lifecycleOwner, view, store, concatAdapter, coroutineContext, metrics)
     }
 
     @After