diff --git a/brightray/brightray.gyp b/brightray/brightray.gyp
index 2724510108..e60d17a158 100644
--- a/brightray/brightray.gyp
+++ b/brightray/brightray.gyp
@@ -99,6 +99,32 @@
                   '<(libchromiumcontent_dir)/libyuv.a',
                   '<(libchromiumcontent_dir)/librenderer.a',
                   '<(libchromiumcontent_dir)/libsecurity_state.a',
+                  # Friends of libpdf.a:
+                  # On Linux we have to use "--whole-archive" to include
+                  # all symbols, otherwise there will be plenty of
+                  # unresolved symbols errors.
+                  '-Wl,--whole-archive',
+                  '<(libchromiumcontent_dir)/libpdf.a',
+                  '<(libchromiumcontent_dir)/libppapi_cpp_objects.a',
+                  '<(libchromiumcontent_dir)/libppapi_internal_module.a',
+                  '<(libchromiumcontent_dir)/libjpeg.a',
+                  '<(libchromiumcontent_dir)/libpdfium.a',
+                  '<(libchromiumcontent_dir)/libfdrm.a',
+                  '<(libchromiumcontent_dir)/libformfiller.a',
+                  '<(libchromiumcontent_dir)/libfpdfapi.a',
+                  '<(libchromiumcontent_dir)/libfpdfdoc.a',
+                  '<(libchromiumcontent_dir)/libfpdftext.a',
+                  '<(libchromiumcontent_dir)/libfxcodec.a',
+                  '<(libchromiumcontent_dir)/libfxedit.a',
+                  '<(libchromiumcontent_dir)/libfxge.a',
+                  '<(libchromiumcontent_dir)/libfxjs.a',
+                  '<(libchromiumcontent_dir)/libjavascript.a',
+                  '<(libchromiumcontent_dir)/libpdfwindow.a',
+                  '<(libchromiumcontent_dir)/libfx_agg.a',
+                  '<(libchromiumcontent_dir)/libfx_lcms2.a',
+                  '<(libchromiumcontent_dir)/libfx_libopenjpeg.a',
+                  '<(libchromiumcontent_dir)/libfx_zlib.a',
+                  '-Wl,--no-whole-archive',
                 ],
               },
             }, {
@@ -152,6 +178,29 @@
                   '<(libchromiumcontent_dir)/libyuv.a',
                   '<(libchromiumcontent_dir)/librenderer.a',
                   '<(libchromiumcontent_dir)/libsecurity_state.a',
+                  # Friends of libpdf.a:
+                  '<(libchromiumcontent_dir)/libpdf.a',
+                  '<(libchromiumcontent_dir)/libppapi_cpp_objects.a',
+                  '<(libchromiumcontent_dir)/libppapi_internal_module.a',
+                  '<(libchromiumcontent_dir)/libjpeg.a',
+                  '<(libchromiumcontent_dir)/libpdfium.a',
+                  '<(libchromiumcontent_dir)/libfdrm.a',
+                  '<(libchromiumcontent_dir)/libformfiller.a',
+                  '<(libchromiumcontent_dir)/libfpdfapi.a',
+                  '<(libchromiumcontent_dir)/libfpdfdoc.a',
+                  '<(libchromiumcontent_dir)/libfpdftext.a',
+                  '<(libchromiumcontent_dir)/libfxcodec.a',
+                  '<(libchromiumcontent_dir)/libfxcrt.a',
+                  '<(libchromiumcontent_dir)/libfxedit.a',
+                  '<(libchromiumcontent_dir)/libfxge.a',
+                  '<(libchromiumcontent_dir)/libfxjs.a',
+                  '<(libchromiumcontent_dir)/libjavascript.a',
+                  '<(libchromiumcontent_dir)/libpdfwindow.a',
+                  '<(libchromiumcontent_dir)/libfx_agg.a',
+                  '<(libchromiumcontent_dir)/libfx_freetype.a',
+                  '<(libchromiumcontent_dir)/libfx_lcms2.a',
+                  '<(libchromiumcontent_dir)/libfx_libopenjpeg.a',
+                  '<(libchromiumcontent_dir)/libfx_zlib.a',
                 ],
               },
             }, {
diff --git a/brightray/common/main_delegate.cc b/brightray/common/main_delegate.cc
index 69719ba3b9..3645f53f47 100644
--- a/brightray/common/main_delegate.cc
+++ b/brightray/common/main_delegate.cc
@@ -49,18 +49,18 @@ void InitializeResourceBundle(const std::string& locale) {
       locale, nullptr, ui::ResourceBundle::DO_NOT_LOAD_COMMON_RESOURCES);
 
   // Load other resource files.
-  base::FilePath path;
 #if defined(OS_MACOSX)
-  path = GetResourcesPakFilePath();
+  LoadCommonResources();
 #else
   base::FilePath pak_dir;
-  PathService::Get(base::DIR_MODULE, &pak_dir);
-  path = pak_dir.Append(FILE_PATH_LITERAL("content_shell.pak"));
-#endif
-
   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
-  bundle.AddDataPackFromPath(path, ui::GetSupportedScaleFactors()[0]);
-#if !defined(OS_MACOSX)
+  PathService::Get(base::DIR_MODULE, &pak_dir);
+  bundle.AddDataPackFromPath(
+      pak_dir.Append(FILE_PATH_LITERAL("content_shell.pak")),
+      ui::GetSupportedScaleFactors()[0]);
+  bundle.AddDataPackFromPath(
+      pak_dir.Append(FILE_PATH_LITERAL("pdf_viewer_resources.pak")),
+      ui::GetSupportedScaleFactors()[0]);
   bundle.AddDataPackFromPath(
       pak_dir.Append(FILE_PATH_LITERAL("blink_image_resources_200_percent.pak")),
       ui::SCALE_FACTOR_200P);
diff --git a/brightray/common/main_delegate.h b/brightray/common/main_delegate.h
index 058e553903..2f63a2fb1b 100644
--- a/brightray/common/main_delegate.h
+++ b/brightray/common/main_delegate.h
@@ -24,7 +24,7 @@ class BrowserClient;
 class ContentClient;
 
 void InitializeResourceBundle(const std::string& locale);
-base::FilePath GetResourcesPakFilePath();
+void LoadCommonResources();
 
 class MainDelegate : public content::ContentMainDelegate {
  public:
diff --git a/brightray/common/main_delegate_mac.mm b/brightray/common/main_delegate_mac.mm
index 464cf68b50..29040840ce 100644
--- a/brightray/common/main_delegate_mac.mm
+++ b/brightray/common/main_delegate_mac.mm
@@ -16,6 +16,7 @@
 #include "base/strings/sys_string_conversions.h"
 #include "content/public/common/content_paths.h"
 #include "content/public/common/content_switches.h"
+#include "ui/base/resource/resource_bundle.h"
 
 namespace brightray {
 
@@ -25,11 +26,19 @@ base::FilePath GetFrameworksPath() {
   return MainApplicationBundlePath().Append("Contents").Append("Frameworks");
 }
 
+base::FilePath GetResourcesPakFilePath(NSString* name) {
+  auto path = [base::mac::FrameworkBundle() pathForResource:name ofType:@"pak"];
+  return base::mac::NSStringToFilePath(path);
 }
 
-base::FilePath GetResourcesPakFilePath() {
-  auto path = [base::mac::FrameworkBundle() pathForResource:@"content_shell" ofType:@"pak"];
-  return base::mac::NSStringToFilePath(path);
+}  // namespace
+
+void LoadCommonResources() {
+  ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
+  bundle.AddDataPackFromPath(GetResourcesPakFilePath(@"content_shell"),
+                             ui::GetSupportedScaleFactors()[0]);
+  bundle.AddDataPackFromPath(GetResourcesPakFilePath(@"pdf_viewer_resources"),
+                             ui::GetSupportedScaleFactors()[0]);
 }
 
 void MainDelegate::OverrideFrameworkBundlePath() {
@@ -47,4 +56,4 @@ void MainDelegate::OverrideChildProcessPath() {
   PathService::Override(content::CHILD_PROCESS_EXE, helper_path);
 }
 
-}
+}  // namespace brightray