Reland attempt 2: Improve <webview> autosize:

content/browser/browser_plugin/browser_plugin_guest.cc

 // 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.
 
 #include "content/browser/browser_plugin/browser_plugin_guest.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 1381 matching lines @@
     const BrowserPluginHostMsg_ResizeGuest_Params& resize_guest_params) {
   bool old_auto_size_enabled = auto_size_enabled_;
   gfx::Size old_max_size = max_auto_size_;
   gfx::Size old_min_size = min_auto_size_;
   auto_size_enabled_ = auto_size_params.enable;
   max_auto_size_ = auto_size_params.max_size;
   min_auto_size_ = auto_size_params.min_size;
   if (auto_size_enabled_ && (!old_auto_size_enabled ||
                              (old_max_size != max_auto_size_) ||
                              (old_min_size != min_auto_size_))) {
+    RecordAction(UserMetricsAction("BrowserPlugin.Guest.EnableAutoResize"));
     GetWebContents()->GetRenderViewHost()->EnableAutoResize(
         min_auto_size_, max_auto_size_);
     // TODO(fsamuel): If we're changing autosize parameters, then we force
     // the guest to completely repaint itself, because BrowserPlugin has
     // allocated a new damage buffer and expects a full frame of pixels.
     // Ideally, we shouldn't need to do this because we shouldn't need to
     // allocate a new damage buffer unless |max_auto_size_| has changed.
     // However, even in that case, layout may not change and so we may
     // not get a full frame worth of pixels.
     Send(new ViewMsg_Repaint(routing_id(), max_auto_size_));
@@ skipping 274 matching lines @@
   request_info.Set(browser_plugin::kRequestMethod,
                    base::Value::CreateStringValue(request_method));
   request_info.Set(browser_plugin::kURL, base::Value::CreateStringValue(url));
 
   RequestPermission(BROWSER_PLUGIN_PERMISSION_TYPE_DOWNLOAD,
                     new DownloadRequest(callback),
                     request_info);
 }
 
 }  // namespace content