Record Sharing.SharedClipboardDevicesToShow on Android.

Bug: 995256
Change-Id: I1b4c1941df162a1946b1e63204be98ea679821aa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1869509Reviewed-by: Richard Knoll <knollr@chromium.org>
Commit-Queue: Michael van Ouwerkerk <mvanouwerkerk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#707406}

chrome/android/java/src/org/chromium/chrome/browser/sharing/shared_clipboard/SharedClipboardMetrics.java

@@ -11,6 +11,11 @@ import org.chromium.chrome.browser.sharing.SharingDialogType;
  * Helper Class for Shared Clipboard metrics.
  */
 public class SharedClipboardMetrics {
+    public static void recordDeviceCount(int count) {
+        RecordHistogram.recordLinearCountHistogram("Sharing.SharedClipboardDevicesToShow", count,
+                /*min=*/1, /*max=*/20, /*num buckets=*/21);
+    }
+
     public static void recordDeviceClick(int index) {
         RecordHistogram.recordLinearCountHistogram("Sharing.SharedClipboardSelectedDeviceIndex",
                 index, /*min=*/1, /*max=*/20, /*num buckets=*/21);

chrome/android/java/src/org/chromium/chrome/browser/sharing/shared_clipboard/SharedClipboardShareActivity.java

@@ -103,6 +103,8 @@ public class SharedClipboardShareActivity
             SharedClipboardMetrics.recordShowEducationalDialog();
         }
 
+        SharedClipboardMetrics.recordDeviceCount(mAdapter.getCount());
+
         ListView listView = findViewById(R.id.device_picker_list);
         listView.setAdapter(mAdapter);
         listView.setOnItemClickListener(this);