service worker: Implement NavigationPreloadManager.setHeaderValue

third_party/WebKit/Source/modules/serviceworkers/NavigationPreloadManager.cpp

Index: third_party/WebKit/Source/modules/serviceworkers/NavigationPreloadManager.cpp
diff --git a/third_party/WebKit/Source/modules/serviceworkers/NavigationPreloadManager.cpp b/third_party/WebKit/Source/modules/serviceworkers/NavigationPreloadManager.cpp
index 9d2a79c8be0dbd4f836b0e09599dc2d4ceb7e34f..1dd01989ef5985ac1e5b4bcc11f9e35fcee727be 100644
--- a/third_party/WebKit/Source/modules/serviceworkers/NavigationPreloadManager.cpp
+++ b/third_party/WebKit/Source/modules/serviceworkers/NavigationPreloadManager.cpp
@@ -4,10 +4,12 @@
 
 #include "modules/serviceworkers/NavigationPreloadManager.h"
 
+#include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "core/dom/DOMException.h"
 #include "modules/serviceworkers/NavigationPreloadCallbacks.h"
 #include "modules/serviceworkers/ServiceWorkerContainerClient.h"
 #include "modules/serviceworkers/ServiceWorkerRegistration.h"
+#include "platform/network/HTTPParsers.h"
 
 namespace blink {
 
@@ -19,10 +21,29 @@ ScriptPromise NavigationPreloadManager::disable(ScriptState* scriptState) {
   return setEnabled(false, scriptState);
 }
 
-ScriptPromise NavigationPreloadManager::setHeaderValue(ScriptState*,
+ScriptPromise NavigationPreloadManager::setHeaderValue(ScriptState* scriptState,
                                                        const String& value) {
-  NOTIMPLEMENTED();
-  return ScriptPromise();
+  ServiceWorkerContainerClient* client =
+      ServiceWorkerContainerClient::from(m_registration->getExecutionContext());
+  if (!client || !client->provider()) {
+    return ScriptPromise::rejectWithDOMException(
+        scriptState, DOMException::create(InvalidStateError, "No provider."));
+  }
+
+  if (!isValidHTTPHeaderValue(value)) {
+    return ScriptPromise::reject(
+        scriptState, V8ThrowException::createTypeError(
+                         scriptState->isolate(),
+                         "The string provided to setHeaderValue ('" + value +
+                             "') is not a valid HTTP header field value."));
+  }
+
+  ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
+  ScriptPromise promise = resolver->promise();
+  m_registration->webRegistration()->setNavigationPreloadHeader(
+      value, client->provider(),
+      wrapUnique(new SetNavigationPreloadHeaderCallbacks(resolver)));
+  return promise;
 }
 
 ScriptPromise NavigationPreloadManager::getState(ScriptState* scriptState) {