[Android WebView] Implement WebSettings.{get|set}LoadWithOverviewMode

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/bind.h"
@@ skipping 2333 matching lines @@
     // URLs larger than |kMaxURLChars| cannot be sent through IPC -
     // see |ParamTraits<GURL>|.
     if (latest_url.possibly_invalid_spec().size() > kMaxURLChars)
       latest_url = GURL();
     Send(new ViewHostMsg_UpdateTargetURL(routing_id_, page_id_, latest_url));
     target_url_ = latest_url;
     target_url_status_ = TARGET_INFLIGHT;
   }
 }
 
+void RenderViewImpl::WebPreferencesUpdated(const WebPreferences& old_prefs) {
+  if (old_prefs.initialize_at_minimum_page_scale !=
+      webkit_preferences_.initialize_at_minimum_page_scale) {
+    webview()->resetScrollAndScaleState();
+  }
+}
+
 gfx::RectF RenderViewImpl::ClientRectToPhysicalWindowRect(
     const gfx::RectF& rect) const {
   gfx::RectF window_rect = rect;
   window_rect.Scale(device_scale_factor_ * webview()->pageScaleFactor());
   return window_rect;
 }
 
 void RenderViewImpl::StartNavStateSyncTimerIfNecessary() {
   // No need to update state if no page has committed yet.
   if (page_id_ == -1)
@@ skipping 2921 matching lines @@
   } else {
     webview()->dragSourceMovedTo(client_point, screen_point, op);
   }
 }
 
 void RenderViewImpl::OnDragSourceSystemDragEnded() {
   webview()->dragSourceSystemDragEnded();
 }
 
 void RenderViewImpl::OnUpdateWebPreferences(const WebPreferences& prefs) {
+  const WebPreferences old_preferences = webkit_preferences_;
   webkit_preferences_ = prefs;
   webkit_preferences_.Apply(webview());
+  WebPreferencesUpdated(old_preferences);
 }
 
 void RenderViewImpl::OnUpdateTimezone() {
   if (webview())
     NotifyTimezoneChange(webview()->mainFrame());
 }
 
 void RenderViewImpl::OnSetAltErrorPageURL(const GURL& url) {
   alternate_error_page_url_ = url;
 }
@@ skipping 1311 matching lines @@
 }
 #endif
 
 void RenderViewImpl::OnReleaseDisambiguationPopupDIB(
     TransportDIB::Handle dib_handle) {
   TransportDIB* dib = TransportDIB::CreateWithHandle(dib_handle);
   RenderProcess::current()->ReleaseTransportDIB(dib);
 }
 
 }  // namespace content