Support dragging texts out of webview/Chrome.

ui/android/window_android.cc

Index: ui/android/window_android.cc
diff --git a/ui/android/window_android.cc b/ui/android/window_android.cc
index 970ddd0415d12fa59ce06c5648f26e87c981b339..11cde005a3bc1493719e25a87eb7c34f41e72785 100644
--- a/ui/android/window_android.cc
+++ b/ui/android/window_android.cc
@@ -17,6 +17,7 @@
 namespace ui {
 
 using base::android::AttachCurrentThread;
+using base::android::JavaRef;
 using base::android::ScopedJavaLocalRef;
 
 WindowAndroid::WindowAndroid(JNIEnv* env, jobject obj) : compositor_(NULL) {
@@ -142,6 +143,16 @@ bool WindowAndroid::CanRequestPermission(const std::string& permission) {
       base::android::ConvertUTF8ToJavaString(env, permission).obj());
 }
 
+void WindowAndroid::StartDragAndDrop(
+    const JavaRef<jobject>& jview_android_delegate,
+    const JavaRef<jstring>& jtext,
+    const JavaRef<jobject>& jimage) {
+  JNIEnv* env = AttachCurrentThread();
+  Java_WindowAndroid_startDragAndDrop(env, GetJavaObject().obj(),
+                                      jview_android_delegate.obj(), jtext.obj(),
+                                      jimage.obj());
+}
+
 // ----------------------------------------------------------------------------
 // Native JNI methods
 // ----------------------------------------------------------------------------