Faster Reload: Specify AllowCaching = false for some URLDataSources that need it

chrome/browser/ui/webui/theme_source.cc

Index: chrome/browser/ui/webui/theme_source.cc
diff --git a/chrome/browser/ui/webui/theme_source.cc b/chrome/browser/ui/webui/theme_source.cc
index 6f7d2cab66b85c0f69755cb4403f7ad3c0b1baad..92b7601539500b3bf7a961f1f6669233cc51545a 100644
--- a/chrome/browser/ui/webui/theme_source.cc
+++ b/chrome/browser/ui/webui/theme_source.cc
@@ -179,6 +179,10 @@ ThemeSource::TaskRunnerForRequestPath(const std::string& path) const {
              : nullptr;
 }
 
+bool ThemeSource::AllowCaching() const {
+  return false;
+}
+
 bool ThemeSource::ShouldServiceRequest(const net::URLRequest* request) const {
   return request->url().SchemeIs(chrome::kChromeSearchScheme) ?
       InstantIOContext::ShouldServiceRequest(request) :