Update implementation following changes to URLRequest cache mode.

mojo/services/network/url_loader_impl.cc

Index: mojo/services/network/url_loader_impl.cc
diff --git a/mojo/services/network/url_loader_impl.cc b/mojo/services/network/url_loader_impl.cc
index 955a49c2e958484272fd7896de24912b26b723d1..89e64b8922ca1a99b7ba693fa21d2a9eadb9eb04 100644
--- a/mojo/services/network/url_loader_impl.cc
+++ b/mojo/services/network/url_loader_impl.cc
@@ -94,6 +94,16 @@ class UploadDataPipeElementReader : public net::UploadElementReader {
   DISALLOW_COPY_AND_ASSIGN(UploadDataPipeElementReader);
 };
 
+bool IsValidCacheMode(int cache_mode) {
+  switch (cache_mode) {
+    case URLRequest::CACHE_MODE_DEFAULT:
+    case URLRequest::CACHE_MODE_BYPASS_CACHE:
+    case URLRequest::CACHE_MODE_ONLY_FROM_CACHE:
+      return true;
+  }
+  return false;
+}
+
 }  // namespace
 
 // Each body fetcher takes ownership of a net::URLRequest and stream its data
@@ -495,6 +505,12 @@ void URLLoaderImpl::StartInternal(URLRequestPtr request) {
   DCHECK(!url_request_);
   DCHECK(!redirect_info_);
 
+  if (!IsValidCacheMode(request->cache_mode)) {
+    // Unknown cache mode. The request must fail.
+    delete this;
+    return;
+  }
+
   if (interceptor_index_ >= 0 &&
       interceptor_index_ < static_cast<int>(interceptors_.size())) {
     interceptors_[interceptor_index_]->InterceptRequest(
@@ -537,10 +553,15 @@ void URLLoaderImpl::StartInternal(URLRequestPtr request) {
         new net::ElementsUploadDataStream(element_readers.Pass(), 0)));
   }
   int load_flags = 0;
-  if (request->bypass_cache)
-    load_flags |= net::LOAD_BYPASS_CACHE;
-  if (request->only_from_cache)
-    load_flags |= net::LOAD_ONLY_FROM_CACHE;
+  switch (request->cache_mode) {
+    case URLRequest::CACHE_MODE_DEFAULT:
+      break;
+    case URLRequest::CACHE_MODE_BYPASS_CACHE:
+      load_flags |= net::LOAD_BYPASS_CACHE;
+    case URLRequest::CACHE_MODE_ONLY_FROM_CACHE:
+      load_flags |= net::LOAD_ONLY_FROM_CACHE;
+      break;
+  }
   if (load_flags)
     url_request_->SetLoadFlags(load_flags);