Make WebView work for external displays (over Presentations).

ui/android/resources/resource_manager_impl_unittest.cc

 // Copyright 2014 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 "cc/resources/ui_resource_bitmap.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/android/resources/resource_manager_impl.h"
 #include "ui/android/resources/system_ui_resource_type.h"
 #include "ui/android/resources/ui_resource_client_android.h"
 #include "ui/android/resources/ui_resource_provider.h"
 #include "ui/gfx/android/java_bitmap.h"
 
 namespace ui {
 
 class TestResourceManagerImpl : public ResourceManagerImpl {
  public:
   explicit TestResourceManagerImpl(UIResourceProvider* provider)
-      : ResourceManagerImpl(provider) {}
+      : ResourceManagerImpl(provider, base::android::GetApplicationContext()) {}
 
   ~TestResourceManagerImpl() override {}
 
   void SetResourceAsLoaded(AndroidResourceType res_type, int res_id) {
     SkBitmap small_bitmap;
     SkCanvas canvas(small_bitmap);
     small_bitmap.allocPixels(
         SkImageInfo::Make(1, 1, kRGBA_8888_SkColorType, kOpaque_SkAlphaType));
     canvas.drawColor(SK_ColorWHITE);
     small_bitmap.setImmutable();
@@ skipping 121 matching lines @@
 
 TEST_F(ResourceManagerTest, ResetLayerTreeHost) {
   EXPECT_NE(0, GetUIResourceId(kTestResourceType));
   LayerTreeHostCleared();
   EXPECT_EQ(0, GetUIResourceId(kTestResourceType));
   LayerTreeHostReturned();
   EXPECT_NE(0, GetUIResourceId(kTestResourceType));
 }
 
 }  // namespace ui