Introduce ViewRoot forwarding input/view events to native

content/browser/devtools/protocol/devtools_protocol_browsertest.cc

 // Copyright 2013 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 <stddef.h>
 #include <utility>
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 36 matching lines @@
 #include "testing/gmock/include/gmock/gmock.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/layout.h"
 #include "ui/compositor/compositor_switches.h"
 #include "ui/gfx/codec/png_codec.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/skia_util.h"
 
+#if defined(OS_ANDROID)
+#include "content/browser/web_contents/web_contents_view.h"
+#include "ui/android/view_root.h"
+#endif
+
 #define EXPECT_SIZE_EQ(expected, actual)               \
   do {                                                 \
     EXPECT_EQ((expected).width(), (actual).width());   \
     EXPECT_EQ((expected).height(), (actual).height()); \
   } while (false)
 
 using testing::ElementsAre;
 
 namespace content {
 
@@ skipping 530 matching lines @@
     command_line->AppendSwitch(switches::kEnablePixelOutputInTests);
   }
 #endif
 };
 
 IN_PROC_BROWSER_TEST_F(CaptureScreenshotTest, CaptureScreenshot) {
   // This test fails consistently on low-end Android devices.
   // See crbug.com/653637.
   if (base::SysInfo::IsLowEndDevice()) return;
 
+#if defined(OS_ANDROID)
+  std::unique_ptr<ui::ViewRoot> view_root(new ui::ViewRoot());

[boliu, 2017/01/03 19:16:11]

it's not clear to me why this test is special, we should make sure *all* tests
set up ViewRoot correctly, even if it's not required to complete the test

[Jinsuk Kim, 2017/01/04 10:45:02]

It was a wrong change added for temporary glitch. Removed.

+  WebContentsImpl* web_contents =
+      static_cast<WebContentsImpl*>(shell()->web_contents());
+  view_root->AddChild(web_contents->GetView()->GetNativeView());
+#endif
+
   shell()->LoadURL(GURL("about:blank"));
   Attach();
   EXPECT_TRUE(
       content::ExecuteScript(shell()->web_contents()->GetRenderViewHost(),
                              "document.body.style.background = '#123456'"));
   SkBitmap expected_bitmap;
   // We compare against the actual physical backing size rather than the
   // view size, because the view size is stored adjusted for DPI and only in
   // integer precision.
   gfx::Size view_size = static_cast<RenderWidgetHostViewBase*>(
@@ skipping 890 matching lines @@
       EXPECT_EQ("polyglottal", value);
       found++;
     } else {
       FAIL();
     }
   }
   EXPECT_EQ(2u, found);
 }
 
 }  // namespace content