Revert of Moving pixel-capturing code from web_test_proxy_base.* into pixel_dump.*

components/test_runner/pixel_dump.h

-// Copyright 2016 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.
-
-#ifndef COMPONENTS_TEST_RUNNER_PIXEL_DUMP_H_
-#define COMPONENTS_TEST_RUNNER_PIXEL_DUMP_H_
-
-#include "base/callback_forward.h"
-#include "components/test_runner/test_runner_export.h"
-
-class SkBitmap;
-
-namespace blink {
-class WebView;
-}  // namespace blink
-
-namespace test_runner {
-
-class LayoutTestRuntimeFlags;
-
-// Dumps image snapshot of |web_view|.  Exact dump mode depends on |flags| (i.e.
-// dump_selection_rect and/or is_printing).  Caller needs to ensure that
-// |layout_test_runtime_flags| stays alive until |callback| gets called.
-TEST_RUNNER_EXPORT void DumpPixelsAsync(
-    blink::WebView* web_view,
-    const LayoutTestRuntimeFlags& layout_test_runtime_flags,
-    float device_scale_factor_for_test,
-    const base::Callback<void(const SkBitmap&)>& callback);
-
-// Copy to clipboard the image present at |x|, |y| coordinates in |web_view|
-// and pass the captured image to |callback|.
-void CopyImageAtAndCapturePixels(
-    blink::WebView* web_view,
-    int x,
-    int y,
-    const base::Callback<void(const SkBitmap&)>& callback);
-
-}  // namespace test_runner
-
-#endif  // COMPONENTS_TEST_RUNNER_PIXEL_DUMP_H_