Remove |use_fallback_path_| from WMPI

media/base/renderer_factory_selector.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/base/renderer_factory_selector.h"
 
 #include "base/logging.h"
 
 namespace media {
 
 RendererFactorySelector::RendererFactorySelector() {}
 
 RendererFactorySelector::~RendererFactorySelector() {}
 
 void RendererFactorySelector::AddFactory(
     FactoryType type,
     std::unique_ptr<RendererFactory> factory) {
   DCHECK(!factories_[type]);
 
   factories_[type] = std::move(factory);
 }
 
 void RendererFactorySelector::SetBaseFactoryType(FactoryType type) {
   DCHECK(factories_[type]);
   base_factory_type_ = type;
+  current_factory_needs_update_ = true;
+}
+
+// For the moment, this method should only be called once or twice.
+// This method will be regularly called whenever the logic in choosing a
+// renderer type is moved out of the AdaptiveRendererFactory, into this method.
+void RendererFactorySelector::UpdateCurrentFactory() {
+  DCHECK(base_factory_type_);
+  FactoryType next_factory_type = base_factory_type_.value();
+
+  if (use_media_player_)
+    next_factory_type = FactoryType::MEDIA_PLAYER;
+
+  DVLOG(1) << __func__ << " Selecting factory type: " << next_factory_type;
+
+  current_factory_ = factories_[next_factory_type].get();
+  current_factory_needs_update_ = false;
 }
 
 RendererFactory* RendererFactorySelector::GetCurrentFactory() {
-  DCHECK(base_factory_type_);
-  FactoryType next_factory_type = base_factory_type_.value();
+  if (current_factory_needs_update_)
+    UpdateCurrentFactory();
 
-  RendererFactory* factory = factories_[next_factory_type].get();
-
-  if (factory == nullptr) {
-    NOTREACHED();
-    return nullptr;
-  }
-
-  DVLOG(1) << __func__ << " Selected factory type: " << next_factory_type;
-
-  return factory;
+  DCHECK(current_factory_);
+  return current_factory_;
 }
 
+#if defined(OS_ANDROID)
+void RendererFactorySelector::SetUseMediaPlayer(bool use_media_player) {
+  use_media_player_ = use_media_player;
+  current_factory_needs_update_ = true;
+}
+#endif
+
 }  // namespace media