WebApp splashscreen: add UMA to record how a splashscreen is constructed.

chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappSplashScreenHomescreenIconTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappSplashScreenHomescreenIconTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappSplashScreenHomescreenIconTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappSplashScreenHomescreenIconTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..70afbfaa0771b01c14f26b8493f17e98f1298bd6
--- /dev/null
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappSplashScreenHomescreenIconTest.java
@@ -0,0 +1,43 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.webapps;
+
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.test.suitebuilder.annotation.SmallTest;
+
+import org.chromium.base.metrics.RecordHistogram;
+import org.chromium.base.test.util.Feature;
+import org.chromium.chrome.browser.ShortcutHelper;
+import org.chromium.chrome.browser.metrics.WebappUma;
+
+/**
+ * Tests for splash screens with EXTRA_ICON specified in the Intent.
+ */
+public class WebappSplashScreenHomescreenIconTest extends WebappActivityTestBase {
+
+    @Override
+    protected Intent createIntent() {
+        Intent intent = super.createIntent();
+        intent.putExtra(ShortcutHelper.EXTRA_ICON, TEST_ICON);
+        return intent;
+    }
+
+    // TODO(mlamouri): test that we actually show the icon.
+
+    @SmallTest
+    @Feature({"Webapps"})
+    public void testUmaFallbackIcon() {
+        assertEquals(1, RecordHistogram.getHistogramValueCountForTesting(
+                WebappUma.HISTOGRAM_SPLASHSCREEN_ICON_TYPE,
+                WebappUma.SPLASHSCREEN_ICON_TYPE_FALLBACK));
+
+        Bitmap icon = ShortcutHelper.decodeBitmapFromString(TEST_ICON);
+        int sizeInDp = Math.round((float) icon.getWidth()
+                / getActivity().getResources().getDisplayMetrics().density);
+        assertEquals(1, RecordHistogram.getHistogramValueCountForTesting(
+                WebappUma.HISTOGRAM_SPLASHSCREEN_ICON_SIZE, sizeInDp));
+    }
+}