customtabs: Convert to the new AIDL interface.

chrome/android/java/src/org/chromium/chrome/browser/util/IntentUtils.java

Index: chrome/android/java/src/org/chromium/chrome/browser/util/IntentUtils.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/util/IntentUtils.java b/chrome/android/java/src/org/chromium/chrome/browser/util/IntentUtils.java
index ae7f1182eb2fa21ca09529ce71cad562532e1398..7489a824afe02a16a8166d27f3c01ebc438fca11 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/util/IntentUtils.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/util/IntentUtils.java
@@ -8,11 +8,14 @@ import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ResolveInfo;
+import android.os.Build;
 import android.os.Bundle;
+import android.os.IBinder;
 import android.os.Parcelable;
 
 import org.chromium.base.Log;
 
+import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -167,4 +170,30 @@ public class IntentUtils {
             return null;
         }
     }
+
+    /**
+     * @return a Binder from an Intent, or null.
+     *
+     * Creates a temporary copy of the extra Bundle, which is required as
+     * Intent#getBinderExtra() doesn't exist, but Bundle.getBinder() does.
+     */
+    public static IBinder safeGetBinderExtra(Intent intent, String name) {
+        if (!intent.hasExtra(name)) return null;
+        try {
+            Bundle extras = intent.getExtras();
+            // Bundle#getBinder() is public starting at API level 18, but exists
+            // in previous SDKs as a hidden method named "getIBinder" (which
+            // still exists as of L MR1 but is hidden and deprecated).
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
+                return extras.getBinder(name);
+            } else {
+                Method getBinderMethod = Bundle.class.getMethod("getIBinder", String.class);
+                return (IBinder) getBinderMethod.invoke(extras, name);
+            }
+        } catch (Throwable t) {
+            // Catches un-parceling exceptions.
+            Log.e(TAG, "getBinder failed on intent " + intent);
+            return null;
+        }
+    }
 }