[DevTools] Move eye dropper functionality from protocol to embedder

chrome/browser/devtools/devtools_eye_dropper.h

+// 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.
+
+#ifndef CHROME_BROWSER_DEVTOOLS_DEVTOOLS_EYE_DROPPER_H_
+#define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_EYE_DROPPER_H_
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "content/public/browser/readback_types.h"
+#include "content/public/browser/render_widget_host.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+
+namespace blink {
+class WebMouseEvent;
+}
+
+class DevToolsEyeDropper : public content::WebContentsObserver {
+ public:
+  typedef base::Callback<void(int, int, int, int)> EyeDropperCallback;
+
+  DevToolsEyeDropper(content::WebContents* web_contents,
+                     EyeDropperCallback callback);
+  ~DevToolsEyeDropper() override;
+
+ private:
+  void AttachToHost(content::RenderWidgetHost* host);
+  void DetachFromHost();
+
+  // content::WebContentsObserver.
+  void DidReceiveCompositorFrame() override;
+  void RenderViewCreated(content::RenderViewHost* host) override;
+  void RenderViewDeleted(content::RenderViewHost* host) override;
+  void RenderViewHostChanged(content::RenderViewHost* old_host,
+                             content::RenderViewHost* new_host) override;
+
+  void UpdateFrame();
+  void ResetFrame();
+  void FrameUpdated(const SkBitmap&, content::ReadbackResponse);
+  bool HandleMouseEvent(const blink::WebMouseEvent& event);
+  void UpdateCursor();
+
+  EyeDropperCallback callback_;
+  SkBitmap frame_;
+  int last_cursor_x_;
+  int last_cursor_y_;
+  content::RenderWidgetHost::MouseEventCallback mouse_event_callback_;
+  content::RenderWidgetHost* host_;
+  base::WeakPtrFactory<DevToolsEyeDropper> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(DevToolsEyeDropper);
+};
+
+#endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_EYE_DROPPER_H_