Add a content API to create a message channel.

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 eac46000a7d7738f2eca7d19275b246f43b530dd..2b07ff2171e6e1bda611af638c1556391c18824c 100644
--- a/android_webview/native/aw_contents.cc
+++ b/android_webview/native/aw_contents.cc
@@ -52,6 +52,7 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/cert_store.h"
 #include "content/public/browser/favicon_status.h"
+#include "content/public/browser/message_port_provider.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
@@ -131,6 +132,13 @@ 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());
+}
+
 }  // namespace
 
 // static
@@ -1175,6 +1183,55 @@ void AwContents::TrimMemory(JNIEnv* env,
   browser_view_renderer_.TrimMemory(level, visible);
 }
 
+// TODO(sgurun) add support for posting a frame whose name is known (only
+//               main frame is supported at this time, see crbug.com/389721)
+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>;
+
+  if (msgPorts != nullptr)
+    base::android::JavaIntArrayToIntVector(env, msgPorts, j_ports);
+
+  BrowserThread::PostTask(
+      BrowserThread::IO,
+      FROM_HERE,
+      base::Bind(&content::MessagePortProvider::PostMessageToFrame,
+                 web_contents_.get(),
+                 base::Owned(j_source_origin),
+                 base::Owned(j_target_origin),
+                 base::Owned(j_message),
+                 base::Owned(j_ports)));
+}
+
+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)));
+}
+
+
 void SetShouldDownloadFavicons(JNIEnv* env, jclass jclazz) {
   g_should_download_favicons = true;
 }