<webview>: First stab at implementing media permission request for guests.

content/browser/browser_plugin/browser_plugin_guest.cc

 // Copyright (c) 2012 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/browser_plugin/browser_plugin_guest.h"
 
 #include <algorithm>
 
 #include "base/string_util.h"
 #include "content/browser/browser_plugin/browser_plugin_guest_helper.h"
 #include "content/browser/browser_plugin/browser_plugin_host_factory.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/browser_plugin_messages.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/resource_request_details.h"
 #include "content/public/browser/user_metrics.h"
+#include "content/public/common/media_stream_request.h"
 #include "content/public/common/result_codes.h"
 #include "content/browser/browser_plugin/browser_plugin_host_factory.h"
 #include "net/base/net_errors.h"
 #include "ui/surface/transport_dib.h"
 #include "webkit/glue/resource_type.h"
 
 namespace content {
 
 // static
 BrowserPluginHostFactory* BrowserPluginGuest::factory_ = NULL;
@@ skipping 91 matching lines @@
   return true;
 }
 
 void BrowserPluginGuest::RendererUnresponsive(WebContents* source) {
   base::ProcessHandle process_handle =
       web_contents()->GetRenderProcessHost()->GetHandle();
   base::KillProcess(process_handle, RESULT_CODE_HUNG, false);
   RecordAction(UserMetricsAction("BrowserPlugin.Guest.Hung"));
 }
 
+void BrowserPluginGuest::RequestMediaAccessPermission(
+    WebContents* web_contents,
+    const content::MediaStreamRequest* request,
+    const content::MediaResponseCallback& callback) {
+  static int request_count = 0;
+  int request_id = request_count++;
+  media_requests_map_.insert(
+      std::make_pair(request_id,
+                     std::make_pair(*request, callback)));
+
+  SendMessageToEmbedder(new BrowserPluginMsg_RequestMediaAccess(instance_id(),
+                                                                request_id));
+}
+
 void BrowserPluginGuest::SetIsAcceptingTouchEvents(bool accept) {
   SendMessageToEmbedder(
       new BrowserPluginMsg_ShouldAcceptTouchEvents(instance_id(), accept));
 }
 
 void BrowserPluginGuest::SetVisibility(bool embedder_visible, bool visible) {
   visible_ = visible;
   if (embedder_visible && visible)
     web_contents()->WasShown();
   else
     web_contents()->WasHidden();
 }
 
 WebContents* BrowserPluginGuest::GetWebContents() {
   return web_contents();
 }
 
 void BrowserPluginGuest::Terminate() {
   RecordAction(UserMetricsAction("BrowserPlugin.Guest.Terminate"));
   base::ProcessHandle process_handle =
       web_contents()->GetRenderProcessHost()->GetHandle();
   base::KillProcess(process_handle, RESULT_CODE_KILLED, false);
 }
 
+void BrowserPluginGuest::AllowMediaAccess(WebContents* embedder_web_contents,
+                                          int request_id,
+                                          bool allow) {
+  MediaStreamRequestsMap::iterator media_request_iter =
+      media_requests_map_.find(request_id);
+  if (media_request_iter == media_requests_map_.end()) {
+    LOG(INFO) << "Not a valid request id";
+    return;
+  }
+  const content::MediaStreamRequest& request = media_request_iter->second.first;
+  const content::MediaResponseCallback& callback =
+      media_request_iter->second.second;
+
+  if (allow) {
+    WebContentsImpl* embedder_web_contents_impl = static_cast<
+        WebContentsImpl*>(embedder_web_contents);
+    // Re-route the request to the embedder's WebContents, the guest gets the
+    // permission this way.
+    embedder_web_contents_impl->RequestMediaAccessPermission(
+        &request, callback);
+  } else {
+    // Deny the request.
+    callback.Run(content::MediaStreamDevices());
+  }
+  media_requests_map_.erase(media_request_iter);
+}
+
 void BrowserPluginGuest::SetDamageBuffer(
     TransportDIB* damage_buffer,
 #if defined(OS_WIN)
     int damage_buffer_size,
 #endif
     const gfx::Size& damage_view_size,
     float scale_factor) {
   // Sanity check: Verify that we've correctly shared the damage buffer memory
   // between the embedder and browser processes.
   DCHECK(*static_cast<unsigned int*>(damage_buffer->memory()) == 0xdeadbeef);
@@ skipping 254 matching lines @@
       break;
   }
 }
 
 void BrowserPluginGuest::SendMessageToEmbedder(IPC::Message* msg) {
   DCHECK(embedder_render_process_host());
   embedder_render_process_host()->Send(msg);
 }
 
 }  // namespace content