Add an IPC channel between the NaCl loader process and the renderer.

chrome/renderer/pepper/ppb_nacl_private_impl.cc

Index: chrome/renderer/pepper/ppb_nacl_private_impl.cc
===================================================================
--- chrome/renderer/pepper/ppb_nacl_private_impl.cc	(revision 135227)
+++ chrome/renderer/pepper/ppb_nacl_private_impl.cc	(working copy)
@@ -22,13 +22,39 @@
 #include "content/public/common/sandbox_init.h"
 #endif
 
+#include "base/path_service.h"
+#include "chrome/common/chrome_paths.h"
+#include "content/public/browser/plugin_service.h"
+#include "content/public/common/content_client.h"
+#include "content/public/renderer/render_thread.h"
+#include "content/public/renderer/render_view.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebDocument.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebElement.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebNode.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebPluginContainer.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
+#include "webkit/plugins/ppapi/host_globals.h"
+#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
+
+using content::RenderThread;
+using webkit::ppapi::HostGlobals;
+using webkit::ppapi::PluginInstance;
+using WebKit::WebElement;
+using WebKit::WebView;

[bbudge, 2012/05/07 18:08:53]

I will get these sorted and pruned down to just what's needed before landing.

+
 namespace {
 
 base::LazyInstance<scoped_refptr<IPC::SyncMessageFilter> >
     g_background_thread_sender = LAZY_INSTANCE_INITIALIZER;
 
+IPC::ChannelHandle g_plugin_ppapi_channel;
+base::ProcessHandle g_plugin_process_handle;
+base::ProcessId g_plugin_process_id;

[bbudge, 2012/05/07 18:08:53]

I need to figure out what to do with these globals. This is just experimental as
jschuh's work will likely change this too.

+
 // Launch NaCl's sel_ldr process.
-bool LaunchSelLdr(const char* alleged_url, int socket_count,
+bool LaunchSelLdr(PP_Instance instance,
+                  const char* alleged_url, int socket_count,
                   void* imc_handles) {
   std::vector<nacl::FileDescriptor> sockets;
   IPC::Message::Sender* sender = content::RenderThread::Get();
@@ -36,7 +62,10 @@
     sender = g_background_thread_sender.Pointer()->get();
 
   if (!sender->Send(new ChromeViewHostMsg_LaunchNaCl(
-          GURL(alleged_url), socket_count, &sockets)))
+          GURL(alleged_url), socket_count, &sockets,
+          &g_plugin_ppapi_channel,
+          &g_plugin_process_handle,
+          &g_plugin_process_id)))
     return false;
 
   CHECK(static_cast<int>(sockets.size()) == socket_count);
@@ -44,9 +73,33 @@
     static_cast<nacl::Handle*>(imc_handles)[i] =
         nacl::ToNativeHandle(sockets[i]);
   }
+
   return true;
 }
 
+bool StartPpapiProxy(PP_Instance instance) {
+  // Using the RenderView, establish the HostDispatcher for the PPAPI proxy.
+  webkit::ppapi::PluginInstance* plugin_instance =
+      content::GetHostGlobals()->GetInstance(instance);
+  if (!plugin_instance)
+    return false;
+  FilePath plugin_path;
+  if (!PathService::Get(chrome::FILE_NACL_PLUGIN, &plugin_path))
+    return false;
+  if (g_plugin_ppapi_channel.name.empty())
+    return false;
+
+  WebView* view =
+      plugin_instance->container()->element().document().frame()->view();
+  content::RenderView* render_view = content::RenderView::FromWebView(view);
+  render_view->CreatePepperHostDispatcher(plugin_path,
+                                          g_plugin_process_id,
+                                          g_plugin_process_handle,
+                                          g_plugin_ppapi_channel);
+
+  return true;
+}
+
 int UrandomFD(void) {
 #if defined(OS_POSIX)
   return GetUrandomFD();
@@ -80,6 +133,7 @@
 
 const PPB_NaCl_Private nacl_interface = {
   &LaunchSelLdr,
+  &StartPpapiProxy,
   &UrandomFD,
   &Are3DInterfacesDisabled,
   &EnableBackgroundSelLdrLaunch,