Rip out browser-side RID caching for most visited items.

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 845397221b1a1be1f72e2a9e49230ff77ab56271..2b61ebe2f2bce603de2b7dd6011dfe53349e9c97 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -9,6 +9,7 @@
 #include "base/metrics/histogram.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/common/child_process_logging.h"
@@ -992,6 +993,16 @@ bool ChromeContentRendererClient::WillSendRequest(
     return true;
   }
 
+  const content::RenderView* render_view =
+      content::RenderView::FromWebView(frame->view());
+  SearchBox* search_box = SearchBox::Get(render_view);
+  if (search_box && url.SchemeIs(chrome::kChromeSearchScheme)) {
+    if (url.host() == chrome::kChromeUIThumbnailHost)
+      return search_box->GenerateThumbnailURLFromTransientURL(url, new_url);
+    else if (url.host() == chrome::kChromeUIFaviconHost)
+      return search_box->GenerateFaviconURLFromTransientURL(url, new_url);
+  }
+
   return false;
 }