Revert of Combine PDF plugin into the Chromium binary.

chrome/common/chrome_paths.cc

Index: chrome/common/chrome_paths.cc
diff --git a/chrome/common/chrome_paths.cc b/chrome/common/chrome_paths.cc
index 9537376b47f4e2e9a27908eb3342680cb287ed82..af56236b4ed642995420578008df28d515b6605b 100644
--- a/chrome/common/chrome_paths.cc
+++ b/chrome/common/chrome_paths.cc
@@ -50,6 +50,16 @@
     FILE_PATH_LITERAL("Macromed\\Flash");
 #endif
 
+// File name of the internal PDF plugin on different platforms.
+const base::FilePath::CharType kInternalPDFPluginFileName[] =
+#if defined(OS_WIN)
+    FILE_PATH_LITERAL("pdf.dll");
+#elif defined(OS_MACOSX)
+    FILE_PATH_LITERAL("PDF.plugin");
+#else  // Linux and Chrome OS
+    FILE_PATH_LITERAL("libpdf.so");
+#endif
+
 const base::FilePath::CharType kInternalNaClPluginFileName[] =
     FILE_PATH_LITERAL("internal-nacl-plugin");
 
@@ -284,6 +294,11 @@
         return false;
       cur = cur.Append(chrome::kPepperFlashPluginFilename);
       break;
+    case chrome::FILE_PDF_PLUGIN:
+      if (!GetInternalPluginsDirectory(&cur))
+        return false;
+      cur = cur.Append(kInternalPDFPluginFileName);
+      break;
     case chrome::FILE_EFFECTS_PLUGIN:
       if (!GetInternalPluginsDirectory(&cur))
         return false;