DialogSurfaceManager implementation.

content/browser/media/android/dialog_surface_activity_mapper.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/browser/media/android/dialog_surface_activity_mapper.h"
+
+// TODO(liberato): browser_media_player_manager only does this if !USE_AURA
+#include "content/browser/android/content_view_core_impl.h"
+#include "content/browser/frame_host/render_frame_host_impl.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/web_contents.h"
+#include "jni/DialogSurfaceActivityMapper_jni.h"
+
+static ScopedJavaLocalRef<jobject> GetContentViewCore(
+    JNIEnv* env,
+    const JavaParamRef<jclass>& jcaller,
+    jint renderer_pid,
+    jint render_frame_id) {
+  base::android::ScopedJavaLocalRef<jobject> nullref;
+
+  // Get the id from the handle.  On android, the handle is the pid.
+  content::RenderProcessHost::iterator it =
+      content::RenderProcessHost::AllHostsIterator();
+  int render_process_id = 0;
+  while (!it.IsAtEnd()) {
+    if (it.GetCurrentValue()->GetHandle() == renderer_pid) {
+      render_process_id = it.GetCurrentValue()->GetID();
+      break;
+    }
+    it.Advance();
+  }
+  if (!render_process_id) {
+    DVLOG(1) << "Cannot find render process for renderer_pid " << renderer_pid;
+    return nullref;
+  }
+
+  // Get the frame from the id.
+  content::RenderFrameHostImpl* frame =
+      content::RenderFrameHostImpl::FromID(render_process_id, render_frame_id);
+  if (!frame)

[Tima Vaisburd, 2016/08/03 18:05:13]

Similar DVLOG(1) as l.33 (and below)? Or not having a frame, web_contents, cvc
would be a normal condition? 

[liberato (no reviews please), 2016/08/03 23:11:54]

Done.

+    return nullref;
+
+  content::WebContents* web_contents =
+      content::WebContents::FromRenderFrameHost(frame);
+  if (!web_contents)
+    return nullref;
+
+  content::ContentViewCore* cvc =
+      content::ContentViewCoreImpl::FromWebContents(web_contents);
+  if (!cvc)
+    return nullref;
+
+  return base::android::ScopedJavaLocalRef<jobject>(cvc->GetJavaObject());
+}
+
+namespace content {
+bool RegisterDialogSurfaceActivityMapper(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+}