Remove page rotation from Print Preview

Custom margins break when the previewed content is rotated. Rotating is
also a very rare user action in print preview, and it is already
unavailable through a UI.

Remove the keyboard shortcuts and the context menu options.

Bug: 275471
Change-Id: Ia8e9e0efa0c2a676bd0e7a916e1fa848a4a21527
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2527905Reviewed-by: Raymes Khoury <raymes@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Commit-Queue: Daniel Hosseinian <dhoss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826347}

chrome/browser/resources/pdf/pdf_viewer_pp.js

@@ -120,21 +120,11 @@ class PDFViewerPPElement extends PDFViewerBaseElement {
           e.preventDefault();
         }
         return;
-      case '[':
-        if (e.ctrlKey) {
-          this.rotateCounterclockwise();
-        }
-        return;
       case '\\':
         if (e.ctrlKey) {
           this.getZoomToolbar_().fitToggleFromHotKey();
         }
         return;
-      case ']':
-        if (e.ctrlKey) {
-          this.rotateClockwise();
-        }
-        return;
     }
 
     // Give print preview a chance to handle the key event.

content/renderer/pepper/pepper_plugin_instance_impl.cc

@@ -1961,10 +1961,8 @@ bool PepperPluginInstanceImpl::IsPdfPlugin() {
 }
 
 bool PepperPluginInstanceImpl::CanRotateView() {
-  if (!LoadPdfInterface() || module()->is_crashed())
-    return false;
-
-  return true;
+  return LoadPdfInterface() && !module()->is_crashed() &&
+         !IsPrintPreviewUrl(document_url_);
 }
 
 void PepperPluginInstanceImpl::RotateView(WebPlugin::RotationType type) {