Refactor GuestViewContainer to split out WebView related logic and MimeHandlerView related logic.

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 9f99262d1107d5279a117484abf56333be0263a1..d3863e725316862bce0eee8da6e291f46047e049 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -120,7 +120,8 @@
 #include "extensions/renderer/dispatcher.h"
 #include "extensions/renderer/extension_helper.h"
 #include "extensions/renderer/extensions_render_frame_observer.h"
-#include "extensions/renderer/guest_view/guest_view_container.h"
+#include "extensions/renderer/guest_view/extensions_guest_view_container.h"
+#include "extensions/renderer/guest_view/mime_handler_view_container.h"
 #include "extensions/renderer/script_context.h"
 #endif
 
@@ -1587,7 +1588,10 @@ ChromeContentRendererClient::CreateBrowserPluginDelegate(
     content::RenderFrame* render_frame,
     const std::string& mime_type) {
 #if defined(ENABLE_EXTENSIONS)
-  return new extensions::GuestViewContainer(render_frame, mime_type);
+  if (mime_type == content::kBrowserPluginMimeType)
+    return new extensions::ExtensionsGuestViewContainer(render_frame);
+  else
+    return new extensions::MimeHandlerViewContainer(render_frame, mime_type);
 #else
   return NULL;
 #endif