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_