Scroll offset pinning and content size notifications were only used for the Mac overlay navigation …

content/renderer/render_view_impl.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/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 632 matching lines @@
       page_id_(-1),
       last_page_id_sent_to_browser_(-1),
       next_page_id_(params->next_page_id),
       history_list_offset_(-1),
       history_list_length_(0),
       frames_in_progress_(0),
       target_url_status_(TARGET_NONE),
 #if defined(OS_ANDROID)
       top_controls_constraints_(cc::BOTH),
 #endif
-      cached_is_main_frame_pinned_to_left_(false),
-      cached_is_main_frame_pinned_to_right_(false),
       has_scrolled_focused_editable_node_into_rect_(false),
       push_messaging_dispatcher_(NULL),
       speech_recognition_dispatcher_(NULL),
       media_stream_dispatcher_(NULL),
       browser_plugin_manager_(NULL),
       midi_dispatcher_(NULL),
       devtools_agent_(NULL),
       accessibility_mode_(AccessibilityModeOff),
       renderer_accessibility_(NULL),
       mouse_lock_dispatcher_(NULL),
@@ skipping 1554 matching lines @@
                                                       preferred_size_));
 }
 
 BrowserPluginManager* RenderViewImpl::GetBrowserPluginManager() {
   if (!browser_plugin_manager_.get())
     browser_plugin_manager_ = BrowserPluginManager::Create(this);
   return browser_plugin_manager_.get();
 }
 
 void RenderViewImpl::UpdateScrollState(WebFrame* frame) {
-  WebSize offset = frame->scrollOffset();
-  WebSize minimum_offset = frame->minimumScrollOffset();
-  WebSize maximum_offset = frame->maximumScrollOffset();
-
-  bool is_pinned_to_left = offset.width <= minimum_offset.width;
-  bool is_pinned_to_right = offset.width >= maximum_offset.width;
-
-  if (is_pinned_to_left != cached_is_main_frame_pinned_to_left_ ||
-      is_pinned_to_right != cached_is_main_frame_pinned_to_right_) {
-    Send(new ViewHostMsg_DidChangeScrollOffsetPinningForMainFrame(
-          routing_id_, is_pinned_to_left, is_pinned_to_right));
-
-    cached_is_main_frame_pinned_to_left_ = is_pinned_to_left;
-    cached_is_main_frame_pinned_to_right_ = is_pinned_to_right;
-  }
-
   Send(new ViewHostMsg_DidChangeScrollOffset(routing_id_));
 }
 
 void RenderViewImpl::didChangeScrollOffset(WebLocalFrame* frame) {
   StartNavStateSyncTimerIfNecessary();
 
   if (webview()->mainFrame() == frame)
     UpdateScrollState(frame);
 
   FOR_EACH_OBSERVER(
@@ skipping 1805 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content