WebView Metrics opt out API

BUG=546823

Review URL: https://codereview.chromium.org/1562303004

Cr-Commit-Position: refs/heads/master@{#368903}

1 files changed, 32 insertions, 0 deletions

diff --git a/android_webview/java/src/org/chromium/android_webview/AwMetricsServiceClient.java b/android_webview/java/src/org/chromium/android_webview/AwMetricsServiceClient.java
index 7775fb2..09173a3 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwMetricsServiceClient.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwMetricsServiceClient.java
@@ -5,8 +5,11 @@
 package org.chromium.android_webview;
 
 import android.content.Context;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
 import android.webkit.ValueCallback;
 
+import org.chromium.base.Log;
 import org.chromium.base.annotations.JNINamespace;
 
 /**
@@ -16,7 +19,36 @@ import org.chromium.base.annotations.JNINamespace;
  */
 @JNINamespace("android_webview")
 public class AwMetricsServiceClient {
+    private static final String TAG = "AwMetricsServiceCli-";
+
+    // Individual apps can use this meta-data tag in their manifest to opt out of metrics
+    // reporting. See https://developer.android.com/reference/android/webkit/WebView.html
+    private static final String OPT_OUT_META_DATA_STR = "android.webkit.WebView.MetricsOptOut";
+
+    private static boolean isAppOptedOut(Context applicationContext) {
+        try {
+            ApplicationInfo info = applicationContext.getPackageManager().getApplicationInfo(
+                    applicationContext.getPackageName(), PackageManager.GET_META_DATA);
+            if (info.metaData == null) {
+                // null means no such tag was found.
+                return false;
+            }
+            // getBoolean returns false if the key is not found, which is what we want.
+            return info.metaData.getBoolean(OPT_OUT_META_DATA_STR);
+        } catch (PackageManager.NameNotFoundException e) {
+            // This should never happen.
+            Log.e(TAG, "App could not find itself by package name!");
+            // The conservative thing is to assume the app HAS opted out.
+            return true;
+        }
+    }
+
     public AwMetricsServiceClient(Context applicationContext) {
+        if (isAppOptedOut(applicationContext)) {
+            return;
+        }
+
+        // Check if the user has consented.
         PlatformServiceBridge.getInstance(applicationContext)
                 .setMetricsSettingListener(new ValueCallback<Boolean>() {
                     public void onReceiveValue(Boolean enabled) {