OOPIF support for layout test pixel dumps.

content/shell/renderer/layout_test/blink_test_runner.h

Index: content/shell/renderer/layout_test/blink_test_runner.h
diff --git a/content/shell/renderer/layout_test/blink_test_runner.h b/content/shell/renderer/layout_test/blink_test_runner.h
index 22c3f7189604940acf4234e41c7a40d95b4b4083..33dff68ce235bbb50c2e8025c307b7362f049182 100644
--- a/content/shell/renderer/layout_test/blink_test_runner.h
+++ b/content/shell/renderer/layout_test/blink_test_runner.h
@@ -163,6 +163,8 @@ class BlinkTestRunner : public RenderViewObserver,
   void ForceTextInputStateUpdate(blink::WebLocalFrame* frame) override;
   bool IsNavigationInitiatedByRenderer(
       const blink::WebURLRequest& request) override;
+  void DumpPixelsAsync(
+      base::OnceCallback<void(const SkBitmap&)> callback) override;
 
   // Resets a RenderView to a known state for layout tests. It is used both when
   // a RenderView is created and when reusing an existing RenderView for the
@@ -189,6 +191,7 @@ class BlinkTestRunner : public RenderViewObserver,
   void OnTryLeakDetection();
   void OnReplyBluetoothManualChooserEvents(
       const std::vector<std::string>& events);
+  void OnPixelsDumpResult(const SkBitmap& result);
 
   // RenderViewObserver implementation.
   void OnDestruct() override;
@@ -223,6 +226,8 @@ class BlinkTestRunner : public RenderViewObserver,
 
   std::unique_ptr<test_runner::AppBannerService> app_banner_service_;
 
+  base::OnceCallback<void(const SkBitmap&)> pixels_dump_callback_;
+
   std::unique_ptr<LeakDetector> leak_detector_;
 
   DISALLOW_COPY_AND_ASSIGN(BlinkTestRunner);