BrowserPluginGuest/Embedder: Remove friend helper classes, made necessary calls public

content/browser/browser_plugin/browser_plugin_guest.cc

Index: content/browser/browser_plugin/browser_plugin_guest.cc
diff --git a/content/browser/browser_plugin/browser_plugin_guest.cc b/content/browser/browser_plugin/browser_plugin_guest.cc
index 762226ce64fb78adc976ba54518df2bb0404d1a4..d4de6cb5f768a32d478cdee3a2bdd49f9e60d51a 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.cc
+++ b/content/browser/browser_plugin/browser_plugin_guest.cc
@@ -73,6 +73,10 @@ void BrowserPluginGuest::RendererUnresponsive(WebContents* source) {
   base::KillProcess(process_handle, RESULT_CODE_HUNG, false);
 }
 
+WebContents* BrowserPluginGuest::GetWebContents() {
+  return web_contents();
+}
+
 void BrowserPluginGuest::SetDamageBuffer(
     TransportDIB* damage_buffer,
 #if defined(OS_WIN)