Enable posting a message from JS to Android webview.

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 2a9a35f91f331150de1ec2da90f48a63b31fb181..64cd9a97e2cd90a849c6f7d0039a87ee3764b8d6 100644
--- a/android_webview/native/aw_contents.cc
+++ b/android_webview/native/aw_contents.cc
@@ -21,6 +21,7 @@
 #include "android_webview/native/aw_browser_dependency_factory.h"
 #include "android_webview/native/aw_contents_client_bridge.h"
 #include "android_webview/native/aw_contents_io_thread_client_impl.h"
+#include "android_webview/native/aw_message_port_service_impl.h"
 #include "android_webview/native/aw_pdf_exporter.h"
 #include "android_webview/native/aw_picture.h"
 #include "android_webview/native/aw_web_contents_delegate.h"
@@ -133,23 +134,6 @@ void OnIoThreadClientReady(content::RenderFrameHost* rfh) {
       render_process_id, render_frame_id);
 }
 
-void OnMessageChannelCreated(ScopedJavaGlobalRef<jobject>* callback,
-                             int* port1,
-                             int* port2) {
-  JNIEnv* env = AttachCurrentThread();
-  Java_AwContents_onMessageChannelCreated(env, *port1, *port2,
-    callback->obj());
-}
-
-void PostMessageToFrameOnIOThread(WebContents* web_contents,
-                                  base::string16* source_origin,
-                                  base::string16* target_origin,
-                                  base::string16* data,
-                                  std::vector<int>* ports) {
-  content::MessagePortProvider::PostMessageToFrame(web_contents,
-      *source_origin, *target_origin, *data, *ports);
-}
-
 }  // namespace
 
 // static
@@ -1084,49 +1068,40 @@ void AwContents::PostMessageToFrame(JNIEnv* env, jobject obj,
     jstring frame_name, jstring message, jstring source_origin,
     jstring target_origin, jintArray msgPorts) {
 
-  base::string16* j_source_origin = new base::string16;
-  ConvertJavaStringToUTF16(env, source_origin, j_source_origin);
-  base::string16* j_target_origin = new base::string16;
-  ConvertJavaStringToUTF16(env, target_origin, j_target_origin);
-  base::string16* j_message = new base::string16;
-  ConvertJavaStringToUTF16(env, message, j_message);
-  std::vector<int>* j_ports  = new std::vector<int>;
-
+  base::string16 j_source_origin(ConvertJavaStringToUTF16(env, source_origin));
+  base::string16 j_target_origin(ConvertJavaStringToUTF16(env, target_origin));
+  base::string16 j_message(ConvertJavaStringToUTF16(env, message));
+  std::vector<int> j_ports;
   if (msgPorts != nullptr)
-    base::android::JavaIntArrayToIntVector(env, msgPorts, j_ports);
-
-  BrowserThread::PostTask(
-      BrowserThread::IO,
-      FROM_HERE,
-      base::Bind(&PostMessageToFrameOnIOThread,
-                 web_contents_.get(),
-                 base::Owned(j_source_origin),
-                 base::Owned(j_target_origin),
-                 base::Owned(j_message),
-                 base::Owned(j_ports)));
+    base::android::JavaIntArrayToIntVector(env, msgPorts, &j_ports);
+
+  content::MessagePortProvider::PostMessageToFrame(web_contents_.get(),
+                                                   j_source_origin,
+                                                   j_target_origin,
+                                                   j_message,
+                                                   j_ports);
+}
+
+scoped_refptr<AwMessagePortMessageFilter>
+AwContents::GetMessagePortMessageFilter() {
+  // Create a message port message filter if necessary
+  if (message_port_message_filter_.get() == nullptr) {
+    message_port_message_filter_ =
+        new AwMessagePortMessageFilter(
+            web_contents_->GetMainFrame()->GetRoutingID());
+    web_contents_->GetRenderProcessHost()->AddFilter(
+        message_port_message_filter_.get());
+  }
+  return message_port_message_filter_;
 }
 
 void AwContents::CreateMessageChannel(JNIEnv* env, jobject obj,
     jobject callback) {
-  ScopedJavaGlobalRef<jobject>* j_callback = new ScopedJavaGlobalRef<jobject>();
-  j_callback->Reset(env, callback);
 
-  int* port1 = new int;
-  int* port2 = new int;
-  BrowserThread::PostTaskAndReply(
-      BrowserThread::IO,
-      FROM_HERE,
-      base::Bind(&content::MessagePortProvider::CreateMessageChannel,
-                 web_contents_.get(),
-                 port1,
-                 port2),
-      base::Bind(&OnMessageChannelCreated,
-                 base::Owned(j_callback),
-                 base::Owned(port1),
-                 base::Owned(port2)));
+  AwMessagePortServiceImpl::GetInstance()->CreateMessageChannel(env, callback,
+      GetMessagePortMessageFilter());
 }
 
-
 void SetShouldDownloadFavicons(JNIEnv* env, jclass jclazz) {
   g_should_download_favicons = true;
 }