Propagate browser zoom changes to embedded PDFs.

chrome/browser/resources/pdf/pdf.js

Index: chrome/browser/resources/pdf/pdf.js
diff --git a/chrome/browser/resources/pdf/pdf.js b/chrome/browser/resources/pdf/pdf.js
index 14aebcf8cdd755cb52ca1a871027d8acf8bc1c35..8db8ba16f94a559e8e11c943398ea1669d866b68 100644
--- a/chrome/browser/resources/pdf/pdf.js
+++ b/chrome/browser/resources/pdf/pdf.js
@@ -131,13 +131,16 @@ function PDFViewer(browserApi) {
   var shortWindow = window.innerHeight < PDFViewer.TOOLBAR_WINDOW_MIN_HEIGHT;
   var topToolbarHeight =
       (toolbarEnabled) ? PDFViewer.MATERIAL_TOOLBAR_HEIGHT : 0;
+  var defaultZoom =
+      this.browserApi_.getZoomBehavior() == BrowserApi.ZoomBehavior.MANAGE ?
+      this.browserApi_.getDefaultZoom() : 1.0;
   this.viewport_ = new Viewport(window,
                                 this.sizer_,
                                 this.viewportChanged_.bind(this),
                                 this.beforeZoom_.bind(this),
                                 this.afterZoom_.bind(this),
                                 getScrollbarWidth(),
-                                this.browserApi_.getDefaultZoom(),
+                                defaultZoom,
                                 topToolbarHeight);
 
   // Create the plugin object dynamically so we can set its src. The plugin
@@ -230,9 +233,11 @@ function PDFViewer(browserApi) {
       new ToolbarManager(window, this.toolbar_, this.zoomToolbar_);
 
   // Set up the ZoomManager.
-  this.zoomManager_ = new ZoomManager(
-      this.viewport_, this.browserApi_.setZoom.bind(this.browserApi_),
+  this.zoomManager_ = ZoomManager.create(
+      this.browserApi_.getZoomBehavior(), this.viewport_,
+      this.browserApi_.setZoom.bind(this.browserApi_),
       this.browserApi_.getInitialZoom());
+  this.viewport_.zoomManager = this.zoomManager_;
   this.browserApi_.addZoomEventListener(
       this.zoomManager_.onBrowserZoomChange.bind(this.zoomManager_));