Rewire Android WebView's compositor changed signal.

android_webview/native/aw_contents.cc

Index: android_webview/native/aw_contents.cc
diff --git a/android_webview/native/aw_contents.cc b/android_webview/native/aw_contents.cc
index 1c05e59047cdd694cb565829c642eec47e1f42fe..e4f088214d2f0b85e171491364b901ae0e6b7afe 100644
--- a/android_webview/native/aw_contents.cc
+++ b/android_webview/native/aw_contents.cc
@@ -171,10 +171,11 @@ AwBrowserPermissionRequestDelegate* AwBrowserPermissionRequestDelegate::FromID(
 
 AwContents::AwContents(std::unique_ptr<WebContents> web_contents)
     : functor_(nullptr),
+      web_contents_(std::move(web_contents)),
       browser_view_renderer_(
+          web_contents.get(),
           this,
           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI)),
-      web_contents_(std::move(web_contents)),
       renderer_manager_key_(GLViewRendererManager::GetInstance()->NullKey()) {
   base::subtle::NoBarrier_AtomicIncrement(&g_instance_count, 1);
   icon_helper_.reset(new IconHelper(web_contents_.get()));