Revert of Implement webview.captureVisibleRegion()

extensions/browser/api/capture_web_contents_function.h

Index: extensions/browser/api/capture_web_contents_function.h
diff --git a/extensions/browser/api/capture_web_contents_function.h b/extensions/browser/api/capture_web_contents_function.h
new file mode 100644
index 0000000000000000000000000000000000000000..53f78f7992725e2cd291c38136c70d6e3e947f09
--- /dev/null
+++ b/extensions/browser/api/capture_web_contents_function.h
@@ -0,0 +1,67 @@
+// 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.
+
+#ifndef EXTENSIONS_BROWSER_API_CAPTURE_WEB_CONTENTS_FUNCTION_H_
+#define EXTENSIONS_BROWSER_API_CAPTURE_WEB_CONTENTS_FUNCTION_H_
+
+#include "base/macros.h"
+#include "content/public/browser/readback_types.h"
+#include "extensions/browser/extension_function.h"
+#include "extensions/common/api/extension_types.h"
+
+class SkBitmap;
+
+namespace content {
+class WebContents;
+}
+
+namespace extensions {
+
+// Base class for capturing visibile area of a WebContents.
+// This is used by both webview.captureVisibleRegion and tabs.captureVisibleTab.
+class CaptureWebContentsFunction : public AsyncExtensionFunction {
+ public:
+  CaptureWebContentsFunction() {}
+
+ protected:
+  ~CaptureWebContentsFunction() override {}
+
+  // ExtensionFunction implementation.
+  bool HasPermission() override;
+  bool RunAsync() override;
+
+  virtual bool IsScreenshotEnabled() = 0;
+  virtual content::WebContents* GetWebContentsForID(int context_id) = 0;
+
+  enum FailureReason {
+    FAILURE_REASON_UNKNOWN,
+    FAILURE_REASON_ENCODING_FAILED,
+    FAILURE_REASON_VIEW_INVISIBLE
+  };
+  virtual void OnCaptureFailure(FailureReason reason) = 0;
+
+ private:
+
+  void CopyFromBackingStoreComplete(const SkBitmap& bitmap,
+                                    content::ReadbackResponse response);
+  void OnCaptureSuccess(const SkBitmap& bitmap);
+
+  // |context_id_| is the ID used to find the relevant WebContents. In the
+  // |tabs.captureVisibleTab()| api, this represents the window-id, and in the
+  // |webview.captureVisibleRegion()| api, this represents the instance-id of
+  // the guest.
+  int context_id_;
+
+  // The format (JPEG vs PNG) of the resulting image.  Set in RunAsync().
+  api::extension_types::ImageFormat image_format_;
+
+  // Quality setting to use when encoding jpegs.  Set in RunAsync().
+  int image_quality_;
+
+  DISALLOW_COPY_AND_ASSIGN(CaptureWebContentsFunction);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_API_CAPTURE_WEB_CONTENTS_FUNCTION_H_