WebView: Add channel info for UMA

android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java

Index: android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java b/android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java
index 64b7c6fc210b41fafd6bb68e92d2d23e182bbe30..38b66d144e7b66ecdc427c9306b6e11fee06910c 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java
@@ -47,6 +47,7 @@ public abstract class AwBrowserProcess {
     private static final String EXCLUSIVE_LOCK_FILE = "webview_data.lock";
     private static RandomAccessFile sLockFile;
     private static FileLock sExclusiveFileLock;
+    private static String sWebViewPackageName;
 
     private static final int MAX_MINIDUMP_UPLOAD_TRIES = 3;
 
@@ -236,4 +237,14 @@ public abstract class AwBrowserProcess {
             }
         }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
     }
+
+    public static void setWebViewPackageName(String webViewPackageName) {
+        assert sWebViewPackageName == null; // Should only be set once
+        sWebViewPackageName = webViewPackageName;
+    }
+
+    public static String getWebViewPackageName() {
+        assert sWebViewPackageName != null;
+        return sWebViewPackageName;
+    }
 }