Adding support for MediaStream and PeerConnection functionality

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index d92ef494e1634fcdd46b7473cd4920ab7af97bf5..dcce65c7e6613735ef2ef8d2ca19f52e3c29da78 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -59,6 +59,8 @@
 #include "content/renderer/load_progress_tracker.h"
 #include "content/renderer/media/audio_message_filter.h"
 #include "content/renderer/media/audio_renderer_impl.h"
+#include "content/renderer/media/media_stream_dependency_factory.h"
+#include "content/renderer/media/media_stream_dispatcher.h"
 #include "content/renderer/media/media_stream_impl.h"
 #include "content/renderer/media/render_media_log.h"
 #include "content/renderer/mhtml_generator.h"
@@ -118,12 +120,15 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSettings.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebStorageNamespace.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebStorageQuotaCallbacks.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebUserMediaClient.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebWindowFeatures.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebCString.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebDragData.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebGraphicsContext3D.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebImage.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebPeerConnectionHandler.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebPeerConnectionHandlerClient.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebPoint.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebRect.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSize.h"
@@ -360,6 +365,7 @@ RenderViewImpl::RenderViewImpl(
       geolocation_dispatcher_(NULL),
       speech_input_dispatcher_(NULL),
       device_orientation_dispatcher_(NULL),
+      media_stream_dispatcher_(NULL),
       p2p_socket_dispatcher_(NULL),
       devtools_agent_(NULL),
       renderer_accessibility_(NULL),
@@ -421,7 +427,8 @@ RenderViewImpl::RenderViewImpl(
   host_window_ = parent_hwnd;
 
 #if defined(ENABLE_P2P_APIS)
-  p2p_socket_dispatcher_ = new content::P2PSocketDispatcher(this);
+  if (!p2p_socket_dispatcher_)
+    p2p_socket_dispatcher_ = new content::P2PSocketDispatcher(this);
 #endif
 
   new MHTMLGenerator(this);
@@ -435,12 +442,6 @@ RenderViewImpl::RenderViewImpl(
 
   new IdleUserDetector(this);
 
-  const CommandLine& command_line = *CommandLine::ForCurrentProcess();
-  if (command_line.HasSwitch(switches::kEnableMediaStream)) {
-    media_stream_impl_ = new MediaStreamImpl(
-        RenderThreadImpl::current()->video_capture_impl_manager());
-  }
-
   content::GetContentClient()->renderer()->RenderViewCreated(this);
 }
 
@@ -476,6 +477,10 @@ RenderViewImpl::~RenderViewImpl() {
     DCHECK_NE(this, it->second) << "Failed to call Close?";
 #endif
 
+  // MediaStreamImpl holds weak references to RenderViewObserver objects,
+  // ensure it's deleted before the observers.
+  media_stream_impl_ = NULL;
+
   FOR_EACH_OBSERVER(RenderViewObserver, observers_, RenderViewGone());
   FOR_EACH_OBSERVER(RenderViewObserver, observers_, OnDestruct());
 }
@@ -526,6 +531,15 @@ RenderViewImpl* RenderViewImpl::Create(
       next_page_id);  // adds reference
 }
 
+WebKit::WebPeerConnectionHandler* RenderViewImpl::CreatePeerConnectionHandler(
+    WebKit::WebPeerConnectionHandlerClient* client) {
+  const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
+  if (!cmd_line->HasSwitch(switches::kEnableMediaStream))
+    return NULL;
+  EnsureMediaStreamImpl();
+  return media_stream_impl_->CreatePeerConnectionHandler(client);
+}
+
 void RenderViewImpl::AddObserver(RenderViewObserver* observer) {
   observers_.AddObserver(observer);
 }
@@ -2982,6 +2996,25 @@ void RenderViewImpl::CheckPreferredSize() {
                                                       preferred_size_));
 }
 
+void RenderViewImpl::EnsureMediaStreamImpl() {
+#if defined(ENABLE_P2P_APIS)
+  if (!p2p_socket_dispatcher_)
+    p2p_socket_dispatcher_ = new content::P2PSocketDispatcher(this);
+#endif
+
+  if (!media_stream_dispatcher_)
+    media_stream_dispatcher_ = new MediaStreamDispatcher(this);
+
+  if (!media_stream_impl_.get()) {
+    MediaStreamDependencyFactory* factory = new MediaStreamDependencyFactory();
+    media_stream_impl_ = new MediaStreamImpl(
+        media_stream_dispatcher_,
+        p2p_socket_dispatcher_,
+        RenderThreadImpl::current()->video_capture_impl_manager(),
+        factory);
+  }
+}
+
 void RenderViewImpl::didChangeContentsSize(WebFrame* frame,
                                            const WebSize& size) {
   if (webview()->mainFrame() != frame)
@@ -4710,6 +4743,14 @@ WebKit::WebPageVisibilityState RenderViewImpl::visibilityState() const {
   return current_state;
 }
 
+WebKit::WebUserMediaClient* RenderViewImpl::userMediaClient() {
+  const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
+  if (!cmd_line->HasSwitch(switches::kEnableMediaStream))
+    return NULL;
+  EnsureMediaStreamImpl();
+  return media_stream_impl_;
+}
+
 bool RenderViewImpl::IsNonLocalTopLevelNavigation(
     const GURL& url, WebKit::WebFrame* frame, WebKit::WebNavigationType type) {
   // Must be a top level frame.