[NoStatePrefetch] Support only GET and HEAD

chrome/browser/prerender/prerender_manager.cc

Index: chrome/browser/prerender/prerender_manager.cc
diff --git a/chrome/browser/prerender/prerender_manager.cc b/chrome/browser/prerender/prerender_manager.cc
index 10887f9b63b0f5129c56d99a44eed3dfc98d06c1..0bef9677fda88bd210375ebcdf627384db315232 100644
--- a/chrome/browser/prerender/prerender_manager.cc
+++ b/chrome/browser/prerender/prerender_manager.cc
@@ -75,15 +75,6 @@ namespace {
 // Time interval at which periodic cleanups are performed.
 const int kPeriodicCleanupIntervalMs = 1000;
 
-// Valid HTTP methods for prerendering.
-const char* const kValidHttpMethods[] = {
-  "GET",
-  "HEAD",
-  "OPTIONS",
-  "POST",
-  "TRACE",
-};
-
 // Length of prerender history, for display in chrome://net-internals
 const int kHistoryLength = 100;
 
@@ -707,19 +698,6 @@ bool PrerenderManager::HasRecentlyBeenNavigatedTo(Origin origin,
 }
 
 // static
-bool PrerenderManager::IsValidHttpMethod(const std::string& method) {
-  // method has been canonicalized to upper case at this point so we can just
-  // compare them.
-  DCHECK_EQ(method, base::ToUpperASCII(method));
-  for (size_t i = 0; i < arraysize(kValidHttpMethods); ++i) {
-    if (method.compare(kValidHttpMethods[i]) == 0)
-      return true;
-  }
-
-  return false;
-}
-
-// static
 bool PrerenderManager::DoesURLHaveValidScheme(const GURL& url) {
   return (url.SchemeIsHTTPOrHTTPS() ||
           url.SchemeIs(extensions::kExtensionScheme) ||