Experimental flag for HiDPI-aware PDF Viewer

chrome/renderer/pepper/ppb_pdf_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 "chrome/renderer/pepper/ppb_pdf_impl.h"
 
+#include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/utf_string_conversions.h"
 #include "build/build_config.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/renderer/print_web_view_helper.h"
 #include "content/public/common/child_process_sandbox_support_linux.h"
 #include "content/public/common/content_client.h"
 #include "content/public/renderer/render_thread.h"
 #include "content/public/renderer/render_view.h"
 #include "grit/webkit_resources.h"
 #include "grit/webkit_strings.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/private/ppb_pdf.h"
@@ skipping 320 matching lines @@
 }
 
 void SaveAs(PP_Instance instance_id) {
   PluginInstance* instance =
       content::GetHostGlobals()->GetInstance(instance_id);
   if (!instance)
     return;
   instance->delegate()->SaveURLAs(instance->plugin_url());
 }
 
+PP_Bool IsFeatureEnabled(PP_PDFFeature feature) {
+  PP_Bool result = PP_FALSE;
+  switch (feature) {
+    case PP_PDFFEATURE_HIDPI:
+      if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableHighDPIPDFPlugin))
+        result = PP_TRUE;
+      break;
+  }
+  return result;
+}
+
 const PPB_PDF ppb_pdf = {
   &GetLocalizedString,
   &GetResourceImage,
   &GetFontFileWithFallback,
   &GetFontTableForPrivateFontFile,
   &SearchString,
   &DidStartLoading,
   &DidStopLoading,
   &SetContentRestriction,
   &HistogramPDFPageCount,
   &UserMetricsRecordAction,
   &HasUnsupportedFeature,
   &SaveAs,
-  &PPB_PDF_Impl::InvokePrintingForInstance
+  &PPB_PDF_Impl::InvokePrintingForInstance,
+  &IsFeatureEnabled
 };
 
 }  // namespace
 
 // static
 const PPB_PDF* PPB_PDF_Impl::GetInterface() {
   return &ppb_pdf;
 }
 
 // static
 void PPB_PDF_Impl::InvokePrintingForInstance(PP_Instance instance_id) {
 #if defined(ENABLE_PRINTING)
   PluginInstance* instance = HostGlobals::Get()->GetInstance(instance_id);
   if (!instance)
     return;
 
   WebKit::WebElement element = instance->container()->element();
   WebKit::WebView* view = element.document().frame()->view();
   content::RenderView* render_view = content::RenderView::FromWebView(view);
 
   PrintWebViewHelper* print_view_helper = PrintWebViewHelper::Get(render_view);
   if (print_view_helper)
     print_view_helper->PrintNode(element);
 #endif
 }