Move LoadProgressTracker to the browser process.

content/common/frame_messages.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.
 
 // IPC messages for interacting with frames.
 // Multiply-included message file, hence no include guard.
 
 #include "content/common/content_export.h"
 #include "content/common/content_param_traits.h"
 #include "content/common/frame_message_enums.h"
@@ skipping 404 matching lines @@
 // duplicates of these during a single load.
 // |to_different_document| will be true unless the load is a fragment
 // navigation, or triggered by history.pushState/replaceState.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_DidStartLoading,
                     bool /* to_different_document */)
 
 // Sent when the renderer is done loading a page. This corresponds to Blink's
 // notion of the throbber stopping.
 IPC_MESSAGE_ROUTED0(FrameHostMsg_DidStopLoading)
 
+// Sent when the renderer changed the progress of a load.
+IPC_MESSAGE_ROUTED1(FrameHostMsg_DidChangeLoadProgress,
+                    double /* load_progress */)
+
 // Requests that the given URL be opened in the specified manner.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_OpenURL, FrameHostMsg_OpenURL_Params)
 
 // Notifies the browser that a frame finished loading.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_DidFinishLoad,
                     GURL /* validated_url */)
 
 // Notifies that the initial empty document of a view has been accessed.
 // After this, it is no longer safe to show a pending navigation's URL without
 // making a URL spoof possible.
@@ skipping 135 matching lines @@
                     SkColor /* color */,
                     std::vector<content::ColorSuggestion> /* suggestions */)
 
 // Asks the browser to end the color chooser.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_EndColorChooser, int /* id */)
 
 // Change the selected color in the color chooser.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_SetSelectedColorInColorChooser,
                     int /* id */,
                     SkColor /* color */)