Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/document/DocumentUma.java

Index: chrome/android/java_staging/src/org/chromium/chrome/browser/document/DocumentUma.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/document/DocumentUma.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/document/DocumentUma.java
new file mode 100644
index 0000000000000000000000000000000000000000..8f83a68d01748c346843fd6ce50cbaf6021ebca2
--- /dev/null
+++ b/chrome/android/java_staging/src/org/chromium/chrome/browser/document/DocumentUma.java
@@ -0,0 +1,98 @@
+// 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.document;
+
+import android.content.Intent;
+
+import org.chromium.base.metrics.RecordHistogram;
+import org.chromium.chrome.browser.BookmarkUtils;
+import org.chromium.chrome.browser.IntentHandler;
+import org.chromium.chrome.browser.util.IntentUtils;
+
+/**
+ * Records UMA relevant to Document mode.
+ */
+public class DocumentUma {
+    /**
+     * Records what caused a DocumentActivity to be resumed.
+     */
+    static void recordStartedBy(int source) {
+        RecordHistogram.recordSparseSlowlyHistogram("DocumentActivity.StartedBy", source);
+    }
+
+    public static void recordInDocumentMode(boolean isInDocumentMode) {
+        RecordHistogram.recordEnumeratedHistogram(
+                "DocumentActivity.RunningMode", isInDocumentMode ? 0 : 1, 2);
+    }
+
+    /**
+     * Records UMA about the Intent fired to create a DocumentActivity.
+     * @param packageName Name of the the application package.
+     * @param intent Intent used to launch the Activity.
+     */
+    static void recordStartedBy(String packageName, Intent intent) {
+        if (intent == null) {
+            recordStartedBy(DocumentMetricIds.STARTED_BY_UNKNOWN);
+            return;
+        }
+
+        int intentSource = DocumentMetricIds.STARTED_BY_UNKNOWN;
+        IntentHandler.ExternalAppId appId =
+                IntentHandler.determineExternalIntentSource(packageName, intent);
+
+        if (intent.hasExtra(IntentHandler.EXTRA_STARTED_BY)) {
+            intentSource = IntentUtils.safeGetIntExtra(intent,
+                    IntentHandler.EXTRA_STARTED_BY, DocumentMetricIds.STARTED_BY_UNKNOWN);
+        } else if (IntentUtils.safeGetBooleanExtra(intent,
+                BookmarkUtils.REUSE_URL_MATCHING_TAB_ELSE_NEW_TAB, false)) {
+            // TODO(dfalcantara): Add a new a boolean instead of piggybacking on this Intent extra.
+            intentSource = DocumentMetricIds.STARTED_BY_LAUNCHER;
+        } else if (IntentUtils.safeGetBooleanExtra(
+                intent, IntentHandler.EXTRA_APPEND_TASK, false)) {
+            intentSource = DocumentMetricIds.STARTED_BY_SEARCH_RESULT_PAGE;
+        } else if (IntentUtils.safeGetBooleanExtra(
+                intent, IntentHandler.EXTRA_PRESERVE_TASK, false)) {
+            // TODO(dfalcantara): Figure out how split apart Intents fired by the search box.
+            intentSource = DocumentMetricIds.STARTED_BY_SEARCH_SUGGESTION_EXTERNAL;
+        } else if (appId == IntentHandler.ExternalAppId.GMAIL) {
+            intentSource = DocumentMetricIds.STARTED_BY_EXTERNAL_APP_GMAIL;
+        } else if (appId == IntentHandler.ExternalAppId.FACEBOOK) {
+            intentSource = DocumentMetricIds.STARTED_BY_EXTERNAL_APP_FACEBOOK;
+        } else if (appId == IntentHandler.ExternalAppId.PLUS) {
+            intentSource = DocumentMetricIds.STARTED_BY_EXTERNAL_APP_PLUS;
+        } else if (appId == IntentHandler.ExternalAppId.TWITTER) {
+            intentSource = DocumentMetricIds.STARTED_BY_EXTERNAL_APP_TWITTER;
+        } else if (appId == IntentHandler.ExternalAppId.CHROME) {
+            intentSource = DocumentMetricIds.STARTED_BY_EXTERNAL_APP_CHROME;
+        } else if (appId == IntentHandler.ExternalAppId.HANGOUTS) {
+            intentSource = DocumentMetricIds.STARTED_BY_EXTERNAL_APP_HANGOUTS;
+        } else if (appId == IntentHandler.ExternalAppId.MESSENGER) {
+            intentSource = DocumentMetricIds.STARTED_BY_EXTERNAL_APP_MESSENGER;
+        } else if (appId == IntentHandler.ExternalAppId.NEWS) {
+            intentSource = DocumentMetricIds.STARTED_BY_EXTERNAL_APP_NEWS;
+        } else if (appId == IntentHandler.ExternalAppId.LINE) {
+            intentSource = DocumentMetricIds.STARTED_BY_EXTERNAL_APP_LINE;
+        } else if (appId == IntentHandler.ExternalAppId.WHATSAPP) {
+            intentSource = DocumentMetricIds.STARTED_BY_EXTERNAL_APP_WHATSAPP;
+        } else if (appId == IntentHandler.ExternalAppId.GSA) {
+            intentSource = DocumentMetricIds.STARTED_BY_EXTERNAL_APP_GSA;
+        } else if (appId == IntentHandler.ExternalAppId.OTHER) {
+            intentSource = DocumentMetricIds.STARTED_BY_EXTERNAL_APP_OTHER;
+        }
+
+        if (intentSource == DocumentMetricIds.STARTED_BY_UNKNOWN) {
+            android.util.Log.d("DocumentUma", "Unknown source detected");
+        }
+
+        if (intentSource >= DocumentMetricIds.STARTED_BY_EXTERNAL_APP_GMAIL
+                && intentSource < DocumentMetricIds.STARTED_BY_CONTEXTUAL_SEARCH) {
+            // Document activity was started from an external app, record which one.
+            RecordHistogram.recordEnumeratedHistogram("MobileIntent.PageLoadDueToExternalApp",
+                    appId.ordinal(), IntentHandler.ExternalAppId.INDEX_BOUNDARY.ordinal());
+        }
+
+        recordStartedBy(intentSource);
+    }
+}