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

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 8dde7b7da823272dab6b3713f96a58f10274d5a8..33b11ce3fc2eba6b1a5cf3bc4b0f8e27f74bd5b5 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -2351,6 +2351,13 @@ void RenderViewImpl::UpdateTargetURL(const GURL& url,
   }
 }
 
+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;
@@ -5292,8 +5299,10 @@ void RenderViewImpl::OnDragSourceSystemDragEnded() {
 }
 
 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() {