Migrate Graphics2D to new design.

content/renderer/pepper/renderer_ppapi_host_impl.cc

Index: content/renderer/pepper/renderer_ppapi_host_impl.cc
diff --git a/content/renderer/pepper/renderer_ppapi_host_impl.cc b/content/renderer/pepper/renderer_ppapi_host_impl.cc
index 0dde8e2638088938589bfe15cc62f51adee725c1..ad9d56a9c84f534b9046c3f7a22c8af8cc52236b 100644
--- a/content/renderer/pepper/renderer_ppapi_host_impl.cc
+++ b/content/renderer/pepper/renderer_ppapi_host_impl.cc
@@ -5,12 +5,14 @@
 #include "content/renderer/pepper/renderer_ppapi_host_impl.h"
 
 #include "base/logging.h"
+#include "content/renderer/pepper/pepper_graphics_2d_host.h"
 #include "content/renderer/pepper/pepper_in_process_resource_creation.h"
 #include "content/renderer/pepper/pepper_in_process_router.h"
 #include "content/renderer/pepper/pepper_plugin_delegate_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "ppapi/proxy/host_dispatcher.h"
 #include "webkit/plugins/ppapi/host_globals.h"
+#include "webkit/plugins/ppapi/plugin_delegate.h"
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 
 using webkit::ppapi::HostGlobals;
@@ -99,7 +101,7 @@ RendererPpapiHostImpl::CreateInProcessResourceCreationAPI(
       new PepperInProcessResourceCreation(this, instance));
 }
 
-ppapi::host::PpapiHost* RendererPpapiHostImpl::GetPpapiHost() {
+ppapi::host::PpapiHost* RendererPpapiHostImpl::GetPpapiHost() const {
   return ppapi_host_.get();
 }
 
@@ -115,6 +117,20 @@ RenderView* RendererPpapiHostImpl::GetRenderViewForInstance(
       instance_object->delegate())->render_view();
 }
 
+webkit::ppapi::PluginDelegate::PlatformGraphics2D*
+RendererPpapiHostImpl::GetPlatformGraphics2D(
+    PP_Resource resource) const {
+  ppapi::host::PpapiHost* ppapi_host = GetPpapiHost();
+  // Make sure the resource from the plugin is a known one, so that we can cast
+  // it safely.
+  if (!ppapi_host->IsGraphics2DResource(resource)) {
+    LOG(ERROR) << "Resource is not Graphics2d";
+    return NULL;
+  }
+  return static_cast<PepperGraphics2DHost*>(
+      ppapi_host->GetResourceHost(resource));
+}
+
 bool RendererPpapiHostImpl::IsValidInstance(
     PP_Instance instance) const {
   return !!GetAndValidateInstance(instance);