[DRAFT] Add new default stylesheet for platform apps.

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index 75f438888378f01c2fe145cde44576a12cd92525..db60eb67161f57291886504a1924c322c165cb68 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -17,10 +17,11 @@
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/content_settings_pattern.h"
-#include "chrome/common/external_ipc_fuzzer.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_set.h"
+#include "chrome/common/extensions/platform_app_messages.h"
+#include "chrome/common/external_ipc_fuzzer.h"
 #include "chrome/common/jstemplate_builder.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/url_constants.h"
@@ -39,6 +40,7 @@
 #include "chrome/renderer/extensions/extension_helper.h"
 #include "chrome/renderer/extensions/extension_process_bindings.h"
 #include "chrome/renderer/extensions/extension_resource_request_policy.h"
+#include "chrome/renderer/extensions/platform_app_dispatcher.h"
 #include "chrome/renderer/extensions/renderer_extension_bindings.h"
 #include "chrome/renderer/external_extension.h"
 #include "chrome/renderer/loadtimes_extension_bindings.h"
@@ -142,6 +144,7 @@ ChromeContentRendererClient::~ChromeContentRendererClient() {
 void ChromeContentRendererClient::RenderThreadStarted() {
   chrome_observer_.reset(new ChromeRenderProcessObserver(this));
   extension_dispatcher_.reset(new ExtensionDispatcher());
+  platform_app_dispatcher_.reset(new PlatformAppDispatcher());
   histogram_snapshots_.reset(new RendererHistogramSnapshots());
   net_predictor_.reset(new RendererNetPredictor());
   spellcheck_.reset(new SpellCheck());
@@ -154,6 +157,7 @@ void ChromeContentRendererClient::RenderThreadStarted() {
 
   thread->AddObserver(chrome_observer_.get());
   thread->AddObserver(extension_dispatcher_.get());
+  thread->AddObserver(platform_app_dispatcher_.get());
   thread->AddObserver(histogram_snapshots_.get());
 #if defined(ENABLE_SAFE_BROWSING)
   thread->AddObserver(phishing_classifier_.get());