Revert of Require WebLocalFrame to be created with a non-null client

third_party/WebKit/Source/web/ChromeClientImpl.cpp

Index: third_party/WebKit/Source/web/ChromeClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/ChromeClientImpl.cpp b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
index f28521197e3537525b78dc6acf7cb4b530d1fb58..17c5196c58af0da104f2b2db6c66d934216c04b5 100644
--- a/third_party/WebKit/Source/web/ChromeClientImpl.cpp
+++ b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
@@ -1131,9 +1131,11 @@
 {
     WebLocalFrameImpl* webFrame = WebLocalFrameImpl::fromFrame(&frame);
     WebFrameClient* client = webFrame->client();
-    DCHECK(client);
-    providePushControllerTo(frame, client->pushClient());
-    provideUserMediaTo(frame, UserMediaClientImpl::create(client->userMediaClient()));
+    if (client) {
+        providePushControllerTo(frame, client->pushClient());
+        provideUserMediaTo(frame, UserMediaClientImpl::create(client->userMediaClient()));
+    }
+
     provideIndexedDBClientTo(frame, IndexedDBClientImpl::create());
     provideLocalFileSystemTo(frame, LocalFileSystemClient::create());
     provideNavigatorContentUtilsTo(frame, NavigatorContentUtilsClientImpl::create(webFrame));
@@ -1143,15 +1145,15 @@
     enableWebBluetooth = true;
 #endif
     if (enableWebBluetooth)
-        BluetoothSupplement::provideTo(frame, client->bluetooth());
-
-    ScreenOrientationController::provideTo(frame, client->webScreenOrientationClient());
+        BluetoothSupplement::provideTo(frame, client ? client->bluetooth() : nullptr);
+
+    ScreenOrientationController::provideTo(frame, client ? client->webScreenOrientationClient() : nullptr);
     if (RuntimeEnabledFeatures::presentationEnabled())
-        PresentationController::provideTo(frame, client->presentationClient());
+        PresentationController::provideTo(frame, client ? client->presentationClient() : nullptr);
     if (RuntimeEnabledFeatures::audioOutputDevicesEnabled())
         provideAudioOutputDeviceClientTo(frame, AudioOutputDeviceClientImpl::create());
     if (RuntimeEnabledFeatures::installedAppEnabled())
-        InstalledAppController::provideTo(frame, client->installedAppClient());
+        InstalledAppController::provideTo(frame, client ? client->installedAppClient() : nullptr);
 }
 
 } // namespace blink