[blimp] Add support for having multiple tabs

blimp/client/app/android/blimp_view.cc

Index: blimp/client/app/android/blimp_view.cc
diff --git a/blimp/client/app/android/blimp_view.cc b/blimp/client/app/android/blimp_view.cc
index 32ed533ef151523e5c6d2c0688f37d6b1aaec571..325fb248573cbab50f9397fc64b61e52035c53c3 100644
--- a/blimp/client/app/android/blimp_view.cc
+++ b/blimp/client/app/android/blimp_view.cc
@@ -19,6 +19,10 @@
 
 using base::android::JavaParamRef;
 
+namespace {
+const int kDummyBlimpContentsId = 0;
+}  // namespace
+
 namespace blimp {
 namespace client {
 namespace app {
@@ -68,7 +72,8 @@ BlimpView::BlimpView(JNIEnv* env,
       &BlimpView::OnSwapBuffersCompleted, weak_ptr_factory_.GetWeakPtr()));
 
   compositor_manager_ = base::MakeUnique<BlimpCompositorManager>(
-      render_widget_feature, compositor_dependencies_.get());
+      kDummyBlimpContentsId, render_widget_feature,
+      compositor_dependencies_.get());
   compositor_->SetContentLayer(compositor_manager_->layer());
 
   java_obj_.Reset(env, jobj);