Changes to content/ to facilitate new zoom extension API

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 26d6b53400e9b5a1075cd5ce463c1e418b156ea3..3d98672ce6ba1a2794f6fc8ea9a6668533f3fa08 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -3286,10 +3286,14 @@ void RenderViewImpl::OnZoom(PageZoom zoom) {
   zoomLevelChanged();
 }
 
-void RenderViewImpl::OnSetZoomLevel(double zoom_level) {
+void RenderViewImpl::OnSetZoomLevel(int zoom_id,
+                                    double zoom_level,
+                                    content::ZoomMode zoom_mode) {
   webview()->hidePopups();
-  webview()->setZoomLevel(zoom_level);
-  zoomLevelChanged();
+  if (zoom_mode != content::kZoomModeManual) {
+    webview()->setZoomLevel(zoom_level);
+  }
+  zoomLevelChanged(zoom_id, zoom_level, zoom_mode == content::kZoomModeDefault);
 }
 
 void RenderViewImpl::OnSetZoomLevelForLoadingURL(const GURL& url,
@@ -4342,15 +4346,19 @@ void RenderViewImpl::zoomLimitsChanged(double minimum_level,
 }
 
 void RenderViewImpl::zoomLevelChanged() {
-  bool remember = !webview()->mainFrame()->document().isPluginDocument();
-  float zoom_level = webview()->zoomLevel();
+  zoomLevelChanged(0, webview()->zoomLevel(), false);
+}
+
+void RenderViewImpl::zoomLevelChanged(int zoom_id, double zoom_level,
+                                      bool remember) {
+  remember = remember && !webview()->mainFrame()->document().isPluginDocument();
 
   FOR_EACH_OBSERVER(RenderViewObserver, observers_, ZoomLevelChanged());
 
   // Tell the browser which url got zoomed so it can update the menu and the
   // saved values if necessary
   Send(new ViewHostMsg_DidZoomURL(
-      routing_id_, zoom_level, remember,
+      routing_id_, zoom_id, zoom_level, remember,
       GURL(webview()->mainFrame()->document().url())));
 }