New implementation of font precache on Windows.

chrome/utility/chrome_content_utility_client.cc

 // Copyright (c) 2011 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/utility/chrome_content_utility_client.h"
 
 #include "base/base64.h"
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_utility_messages.h"
 #include "chrome/common/extensions/extension_l10n_util.h"
 #include "chrome/common/extensions/extension_unpacker.h"
 #include "chrome/common/extensions/update_manifest.h"
 #include "chrome/common/web_resource/web_resource_unpacker.h"
 #include "content/utility/utility_thread.h"
 #include "printing/backend/print_backend.h"
 #include "printing/page_range.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/gfx/rect.h"
 #include "webkit/glue/image_decoder.h"
 
 #if defined(OS_WIN)
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/win/iat_patch_function.h"
 #include "base/win/scoped_handle.h"
+#include "content/common/child_process_messages.h"
 #include "content/common/content_switches.h"
 #include "content/common/sandbox_init_wrapper.h"
 #include "printing/emf_win.h"
 #endif  // defined(OS_WIN)
 
 namespace chrome {
 
 ChromeContentUtilityClient::ChromeContentUtilityClient() {
 }
 
@@ skipping 176 matching lines @@
 DWORD WINAPI UtilityProcess_GetFontDataPatch(
     HDC hdc, DWORD table, DWORD offset, LPVOID buffer, DWORD length) {
   int rv = GetFontData(hdc, table, offset, buffer, length);
   if (rv == GDI_ERROR && hdc) {
     HFONT font = static_cast<HFONT>(GetCurrentObject(hdc, OBJ_FONT));
 
     LOGFONT logfont;
     if (GetObject(font, sizeof(LOGFONT), &logfont)) {
       std::vector<char> font_data;
       if (UtilityThread::current()->Send(
-              new ChromeUtilityHostMsg_PreCacheFont(logfont)))
+              new ChromeUtilityHostMsg_PreCacheFont(logfont))) {
         rv = GetFontData(hdc, table, offset, buffer, length);
+        UtilityThread::current()->Send(
+            new ChromeUtilityHostMsg_ReleaseCachedFonts());
+      }
     }
   }
   return rv;
 }
 
 bool ChromeContentUtilityClient::RenderPDFToWinMetafile(
     base::PlatformFile pdf_file,
     const FilePath& metafile_path,
     const gfx::Rect& render_area,
     int render_dpi,
@@ skipping 108 matching lines @@
     Send(new ChromeUtilityHostMsg_GetPrinterCapsAndDefaults_Succeeded(
         printer_name, printer_info));
   } else {
     Send(new ChromeUtilityHostMsg_GetPrinterCapsAndDefaults_Failed(
         printer_name));
   }
   UtilityThread::current()->ReleaseProcessIfNeeded();
 }
 
 }  // namespace chrome