Revert of Combine PDF plugin into the Chromium binary.

chrome/child/pdf_child_init.cc

 // Copyright 2015 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/child/pdf_child_init.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "chrome/common/chrome_paths.h"
@@ skipping 41 matching lines @@
   return rv;
 }
 #endif  // OS_WIN
 
 }  // namespace
 
 void InitializePDF() {
 #if defined(OS_WIN)
   // Need to patch a few functions for font loading to work correctly. This can
   // be removed once we switch PDF to use Skia.
-  HMODULE current_module = NULL;
-  wchar_t current_module_name[MAX_PATH];
-  CHECK(GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
-                          reinterpret_cast<LPCWSTR>(InitializePDF),
-                          &current_module));
-  DWORD result = GetModuleFileNameW(current_module, current_module_name,
-                                    MAX_PATH);
-  if (!result || result == MAX_PATH)
-    return;
-  g_iat_patch_createdca.Patch(current_module_name, "gdi32.dll", "CreateDCA",
-                              CreateDCAPatch);
-  g_iat_patch_get_font_data.Patch(current_module_name, "gdi32.dll",
-                                  "GetFontData", GetFontDataPatch);
-#endif  // OS_WIN
+  base::FilePath pdf;
+  if (PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf) &&
+      base::PathExists(pdf)) {
+    g_iat_patch_createdca.Patch(pdf.value().c_str(), "gdi32.dll", "CreateDCA",
+                                CreateDCAPatch);
+    g_iat_patch_get_font_data.Patch(pdf.value().c_str(), "gdi32.dll",
+                                    "GetFontData", GetFontDataPatch);
+  }
+#endif
 }
 
 }  // namespace chrome