Add NaCl support to app_shell

Perform NaCl initialization during app_shell's startup path similar to
how Chrome initializes it.
* Refactor some of the lazy background page impulse code into ProcessManager so it can be shared with Chrome

BUG=400577
TEST=manual tests of app_shell, existing ProcessManager unit tests and browser tests

Review URL: https://codereview.chromium.org/437503004

Cr-Commit-Position: refs/heads/master@{#290082}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@290082 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 65 insertions, 2 deletions

diff --git a/extensions/shell/renderer/DEPS b/extensions/shell/renderer/DEPS
index baafcac..bf14c1d 100644
--- a/extensions/shell/renderer/DEPS
+++ b/extensions/shell/renderer/DEPS
@@ -1,7 +1,9 @@
 include_rules = [
   # Only allow includes the renderer can use.
+  "+components/nacl/common",
+  "+components/nacl/renderer",
   "+content/public/renderer",
-
+  "+ppapi",
   "+third_party/WebKit/public",
   "+v8/include",
 ]
diff --git a/extensions/shell/renderer/shell_content_renderer_client.cc b/extensions/shell/renderer/shell_content_renderer_client.cc
index c7a9be6..b6f8ed7 100644
--- a/extensions/shell/renderer/shell_content_renderer_client.cc
+++ b/extensions/shell/renderer/shell_content_renderer_client.cc
@@ -16,6 +16,13 @@
 #include "extensions/shell/renderer/shell_extensions_renderer_client.h"
 #include "extensions/shell/renderer/shell_renderer_main_delegate.h"
 
+#if !defined(DISABLE_NACL)
+#include "components/nacl/common/nacl_constants.h"
+#include "components/nacl/renderer/nacl_helper.h"
+#include "components/nacl/renderer/ppb_nacl_private_impl.h"
+#include "ppapi/c/private/ppb_nacl_private.h"
+#endif
+
 using blink::WebFrame;
 using blink::WebString;
 using content::RenderThread;
@@ -93,8 +100,15 @@ void ShellContentRendererClient::RenderThreadStarted() {
 
 void ShellContentRendererClient::RenderFrameCreated(
     content::RenderFrame* render_frame) {
-  // ShellFrameHelper destroyes itself when the RenderFrame is destroyed.
+  // ShellFrameHelper destroys itself when the RenderFrame is destroyed.
   new ShellFrameHelper(render_frame, extension_dispatcher_.get());
+
+  // TODO(jamescook): Do we need to add a new PepperHelper(render_frame) here?
+  // It doesn't seem necessary for either Pepper or NaCl.
+  // http://crbug.com/403004
+#if !defined(DISABLE_NACL)
+  new nacl::NaClHelper(render_frame);
+#endif
 }
 
 void ShellContentRendererClient::RenderViewCreated(
@@ -104,6 +118,22 @@ void ShellContentRendererClient::RenderViewCreated(
     delegate_->OnViewCreated(render_view);
 }
 
+bool ShellContentRendererClient::OverrideCreatePlugin(
+    content::RenderFrame* render_frame,
+    blink::WebLocalFrame* frame,
+    const blink::WebPluginParams& params,
+    blink::WebPlugin** plugin) {
+  // Allow the content module to create the plugin.
+  return false;
+}
+
+blink::WebPlugin* ShellContentRendererClient::CreatePluginReplacement(
+    content::RenderFrame* render_frame,
+    const base::FilePath& plugin_path) {
+  // Don't provide a custom "failed to load" plugin.
+  return NULL;
+}
+
 bool ShellContentRendererClient::WillSendRequest(
     blink::WebFrame* frame,
     content::PageTransition transition_type,
@@ -123,6 +153,27 @@ void ShellContentRendererClient::DidCreateScriptContext(
       frame, context, extension_group, world_id);
 }
 
+const void* ShellContentRendererClient::CreatePPAPIInterface(
+    const std::string& interface_name) {
+#if !defined(DISABLE_NACL)
+  if (interface_name == PPB_NACL_PRIVATE_INTERFACE)
+    return nacl::GetNaClPrivateInterface();
+#endif
+  return NULL;
+}
+
+bool ShellContentRendererClient::IsExternalPepperPlugin(
+    const std::string& module_name) {
+#if !defined(DISABLE_NACL)
+  // TODO(bbudge) remove this when the trusted NaCl plugin has been removed.
+  // We must defer certain plugin events for NaCl instances since we switch
+  // from the in-process to the out-of-process proxy after instantiating them.
+  return module_name == nacl::kNaClPluginName;
+#else
+  return false;
+#endif
+}
+
 bool ShellContentRendererClient::ShouldEnableSiteIsolationPolicy() const {
   // Extension renderers don't need site isolation.
   return false;
diff --git a/extensions/shell/renderer/shell_content_renderer_client.h b/extensions/shell/renderer/shell_content_renderer_client.h
index e7a1fbc..f40233c 100644
--- a/extensions/shell/renderer/shell_content_renderer_client.h
+++ b/extensions/shell/renderer/shell_content_renderer_client.h
@@ -29,6 +29,13 @@ class ShellContentRendererClient : public content::ContentRendererClient {
   virtual void RenderThreadStarted() OVERRIDE;
   virtual void RenderFrameCreated(content::RenderFrame* render_frame) OVERRIDE;
   virtual void RenderViewCreated(content::RenderView* render_view) OVERRIDE;
+  virtual bool OverrideCreatePlugin(content::RenderFrame* render_frame,
+                                    blink::WebLocalFrame* frame,
+                                    const blink::WebPluginParams& params,
+                                    blink::WebPlugin** plugin) OVERRIDE;
+  virtual blink::WebPlugin* CreatePluginReplacement(
+      content::RenderFrame* render_frame,
+      const base::FilePath& plugin_path) OVERRIDE;
   virtual bool WillSendRequest(blink::WebFrame* frame,
                                content::PageTransition transition_type,
                                const GURL& url,
@@ -38,6 +45,9 @@ class ShellContentRendererClient : public content::ContentRendererClient {
                                       v8::Handle<v8::Context> context,
                                       int extension_group,
                                       int world_id) OVERRIDE;
+  virtual const void* CreatePPAPIInterface(
+      const std::string& interface_name) OVERRIDE;
+  virtual bool IsExternalPepperPlugin(const std::string& module_name) OVERRIDE;
   virtual bool ShouldEnableSiteIsolationPolicy() const OVERRIDE;
 
  private: