Moving capture_web_contents_function to extensions.

extensions/browser/api/capture_web_contents_function.h

 // 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 CHROME_BROWSER_EXTENSIONS_API_CAPTURE_WEB_CONTENTS_FUNCTION_H_
 #define CHROME_BROWSER_EXTENSIONS_API_CAPTURE_WEB_CONTENTS_FUNCTION_H_
 
-#include "chrome/browser/extensions/chrome_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.

[Ken Rockot(use gerrit already), 2014/09/04 01:27:50]

Please document T here, as it is not obvious at first glance why this is
templated or how it should be used.

-class CaptureWebContentsFunction : public ChromeAsyncExtensionFunction {
+template <typename T>
+class CaptureWebContentsFunction : public T {
  public:
-  CaptureWebContentsFunction();
+  CaptureWebContentsFunction() {}
 
  protected:
-  virtual ~CaptureWebContentsFunction();
+  virtual ~CaptureWebContentsFunction() {}
 
   // ExtensionFunction implementation.
   virtual bool HasPermission() OVERRIDE;
   virtual 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;
 
+  // ValidationFailure override to match RunAsync().
+  static bool ValidationFailure(CaptureWebContentsFunction* function);
+
  private:
   typedef core_api::extension_types::ImageDetails ImageDetails;
 
   void CopyFromBackingStoreComplete(bool succeed, const SkBitmap& bitmap);
   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().
   ImageDetails::Format image_format_;
 
   // Quality setting to use when encoding jpegs.  Set in RunAsync().
   int image_quality_;
 
   DISALLOW_COPY_AND_ASSIGN(CaptureWebContentsFunction);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_CAPTURE_WEB_CONTENTS_FUNCTION_H_