Implement BackgroundFetchManager::{get, fetch}()

third_party/WebKit/Source/modules/background_fetch/BackgroundFetchManager.cpp

Index: third_party/WebKit/Source/modules/background_fetch/BackgroundFetchManager.cpp
diff --git a/third_party/WebKit/Source/modules/background_fetch/BackgroundFetchManager.cpp b/third_party/WebKit/Source/modules/background_fetch/BackgroundFetchManager.cpp
index 27fabfcdbbd5b3b78f5878719ee0298e3428d57f..a1339f50c9bf2c09e144a890e6488f00270952ba 100644
--- a/third_party/WebKit/Source/modules/background_fetch/BackgroundFetchManager.cpp
+++ b/third_party/WebKit/Source/modules/background_fetch/BackgroundFetchManager.cpp
@@ -4,8 +4,11 @@
 
 #include "modules/background_fetch/BackgroundFetchManager.h"
 
+#include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
-#include "core/dom/DOMException.h"
+#include "bindings/core/v8/V8ThrowException.h"
+#include "modules/background_fetch/BackgroundFetchOptions.h"
+#include "modules/background_fetch/BackgroundFetchRegistration.h"
 #include "modules/serviceworkers/ServiceWorkerRegistration.h"
 
 namespace blink {
@@ -16,10 +19,70 @@ BackgroundFetchManager::BackgroundFetchManager(
   DCHECK(registration);
 }
 
+ScriptPromise BackgroundFetchManager::fetch(
+    ScriptState* scriptState,
+    String tag,
+    HeapVector<RequestOrUSVString> requests,
+    const BackgroundFetchOptions& options) {
+  if (!m_registration->active()) {
+    return ScriptPromise::reject(
+        scriptState,
+        V8ThrowException::createTypeError(scriptState->isolate(),
+                                          "No active registration available on "
+                                          "the ServiceWorkerRegistration."));
+  }
+
+  ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
+  ScriptPromise promise = resolver->promise();
+
+  // TODO(peter): Register the fetch() with the browser process. The reject
+  // cases there are storage errors and duplicated registrations for the `tag`
+  // given the `m_registration`.
+  BackgroundFetchRegistration* registration = new BackgroundFetchRegistration(
+      m_registration.get(), tag, options.icons(), options.totalDownloadSize(),
+      options.title());
+
+  resolver->resolve(registration);
+
+  return promise;
+}
+
+ScriptPromise BackgroundFetchManager::get(ScriptState* scriptState,
+                                          String tag) {
+  if (!m_registration->active()) {
+    return ScriptPromise::reject(
+        scriptState,
+        V8ThrowException::createTypeError(scriptState->isolate(),
+                                          "No active registration available on "
+                                          "the ServiceWorkerRegistration."));
+  }
+
+  ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
+  ScriptPromise promise = resolver->promise();
+
+  // TODO(peter): Get the background fetch registration for `tag` from the
+  // browser process. There may not be one.
+  resolver->resolve(v8::Null(scriptState->isolate()));
+
+  return promise;
+}
+
 ScriptPromise BackgroundFetchManager::getTags(ScriptState* scriptState) {
-  return ScriptPromise::rejectWithDOMException(
-      scriptState,
-      DOMException::create(NotSupportedError, "Not implemented yet."));
+  if (!m_registration->active()) {
+    return ScriptPromise::reject(
+        scriptState,
+        V8ThrowException::createTypeError(scriptState->isolate(),
+                                          "No active registration available on "
+                                          "the ServiceWorkerRegistration."));
+  }
+
+  ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
+  ScriptPromise promise = resolver->promise();
+
+  // TODO(peter): Get a list of tags from the browser process.
+  resolver->resolve(Vector<String>());
+
+  return promise;
 }
 
 DEFINE_TRACE(BackgroundFetchManager) {