Request uncompressed images from data reduction proxy when saving.

content/public/browser/web_contents.h

 // Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 456 matching lines @@
   // Prepare for saving the current web page to disk.
   virtual void OnSavePage() = 0;
 
   // Save page with the main HTML file path, the directory for saving resources,
   // and the save type: HTML only or complete web page. Returns true if the
   // saving process has been initiated successfully.
   virtual bool SavePage(const base::FilePath& main_file,
                         const base::FilePath& dir_path,
                         SavePageType save_type) = 0;
 
-  // Saves the given frame's URL to the local filesystem..
+  // Saves the given frame's URL to the local filesystem.
   virtual void SaveFrame(const GURL& url,
                          const Referrer& referrer) = 0;
 
+  // Saves the given frame's URL to the local filesystem. The headers, if
+  // provided, is used to make a request to the URL rather than using cache.
+  // Format of |headers| is a new line separated list of key value pairs:
+  // "<key1>: <value1>\n<key2>: <value2>".

[Avi (use Gerrit), 2015/03/06 23:55:20]

Are these spaces right? You split on ":", not on ": ".

[Not at Google. Contact bengr, 2015/03/07 00:45:02]

Space doesn't matter since each they are trimmed by the SplitString method. Even
if the trimming didn't happen, this would still work since space is allowed in
headers.

[Avi (use Gerrit), 2015/03/07 00:50:02]

Oh. I didn't know that about SplitString. Thank you for pointing that out.

+  virtual void SaveFrameWithHeaders(const GURL& url,
+                                    const Referrer& referrer,
+                                    const std::string& headers) = 0;
+
   // Generate an MHTML representation of the current page in the given file.
   virtual void GenerateMHTML(
       const base::FilePath& file,
       const base::Callback<void(
           int64 /* size of the file */)>& callback) = 0;
 
   // Returns the contents MIME type after a navigation.
   virtual const std::string& GetContentsMimeType() const = 0;
 
   // Returns true if this WebContents will notify about disconnection.
@@ skipping 137 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class WebContentsImpl;
   WebContents() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_