Migrate MediaDevices.enumerateDevices to Mojo

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index a0bd7a4cab1230aa9b31931e38929ef992a59942..35dd4054702cbbc2901f7f1cd12c0d9003a4552f 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -21,6 +21,7 @@
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/accessibility/browser_accessibility_state_impl.h"
 #include "content/browser/bluetooth/web_bluetooth_service_impl.h"
+#include "content/browser/browser_main_loop.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/devtools/render_frame_devtools_agent_host.h"
 #include "content/browser/download/mhtml_generation_manager.h"
@@ -43,6 +44,7 @@
 #include "content/browser/presentation/presentation_service_impl.h"
 #include "content/browser/renderer_host/input/input_router_impl.h"
 #include "content/browser/renderer_host/input/timeout_monitor.h"
+#include "content/browser/renderer_host/media/media_devices_dispatcher_host.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/renderer_host/render_view_host_delegate_view.h"
@@ -74,6 +76,7 @@
 #include "content/public/browser/permission_type.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_widget_host_view.h"
+#include "content/public/browser/resource_context.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/stream_handle.h"
 #include "content/public/browser/user_metrics.h"
@@ -2209,6 +2212,28 @@ void RenderFrameHostImpl::RegisterMojoInterfaces() {
         BrowserThread::GetTaskRunnerForThread(BrowserThread::IO));
   }
 
+#if defined(ENABLE_WEBRTC)
+  // BrowserMainLoop::GetInstance() may be null on unit tests.
+  if (BrowserMainLoop::GetInstance()) {
+    // BrowserMainLoop, which owns MediaStreamManager, is alive for the lifetime
+    // of Mojo communication (see BrowserMainLoop::ShutdownThreadsAndCleanUp(),
+    // which shuts down Mojo). Hence, passing that MediaStreamManager instance
+    // as a raw pointer here is safe.
+    MediaStreamManager* media_stream_manager =
+        BrowserMainLoop::GetInstance()->media_stream_manager();
+    GetInterfaceRegistry()->AddInterface(
+        base::Bind(&MediaDevicesDispatcherHost::Create, GetProcess()->GetID(),
+                   GetRoutingID(), GetProcess()
+                                       ->GetBrowserContext()
+                                       ->GetResourceContext()
+                                       ->GetMediaDeviceIDSalt(),
+                   base::Unretained(media_stream_manager),
+                   base::CommandLine::ForCurrentProcess()->HasSwitch(
+                       switches::kUseFakeUIForMediaStream)),
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::IO));
+  }
+#endif
+
   GetContentClient()->browser()->RegisterRenderFrameMojoInterfaces(
       GetInterfaceRegistry(), this);
 }