blink fonts: Load Android SkFontMgr on Linux.

content/zygote/zygote_main_linux.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 "content/zygote/zygote_main.h"
 
 #include <dlfcn.h>
 #include <fcntl.h>
 #include <openssl/rand.h>
 #include <pthread.h>
@@ skipping 28 matching lines @@
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "content/public/common/sandbox_linux.h"
 #include "content/public/common/zygote_fork_delegate_linux.h"
 #include "content/zygote/zygote_linux.h"
 #include "sandbox/linux/services/credentials.h"
 #include "sandbox/linux/services/init_process_reaper.h"
 #include "sandbox/linux/services/namespace_sandbox.h"
 #include "sandbox/linux/services/thread_helpers.h"
 #include "sandbox/linux/suid/client/setuid_sandbox_client.h"
+#include "third_party/WebKit/public/web/linux/WebFontRendering.h"
 #include "third_party/icu/source/i18n/unicode/timezone.h"
 #include "third_party/skia/include/ports/SkFontConfigInterface.h"
+#include "third_party/skia/include/ports/SkFontMgr_android.h"
 
 #if defined(OS_LINUX)
 #include <sys/prctl.h>
 #endif
 
 #if defined(ENABLE_PLUGINS)
 #include "content/common/pepper_plugin_list.h"
 #include "content/public/common/pepper_plugin_info.h"
 #endif
 
@@ skipping 276 matching lines @@
   // will work inside the sandbox.
   RAND_set_urandom_fd(base::GetUrandomFD());
 
 #if defined(ENABLE_PLUGINS)
   // Ensure access to the Pepper plugins before the sandbox is turned on.
   PreloadPepperPlugins();
 #endif
 #if defined(ENABLE_WEBRTC)
   InitializeWebRtcModule();
 #endif
+
   SkFontConfigInterface::SetGlobal(
       new FontConfigIPC(GetSandboxFD()))->unref();
+
+  // Set the android SkFontMgr for blink. We need to ensure this is done
+  // before the sandbox is initialized to allow the font manager to access
+  // font configuration files on disk.
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kAndroidFontsPath)) {
+    std::string android_fonts_dir =
+        base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+            switches::kAndroidFontsPath);
+
+    if (android_fonts_dir.size() > 0 && android_fonts_dir.back() != '/')
+      android_fonts_dir += '/';
+    std::string font_config = android_fonts_dir + "fonts.xml";
+    SkFontMgr_Android_CustomFonts custom;
+    custom.fSystemFontUse =
+        SkFontMgr_Android_CustomFonts::SystemFontUse::kOnlyCustom;
+    custom.fBasePath = android_fonts_dir.c_str();
+    custom.fFontsXml = font_config.c_str();
+    custom.fFallbackFontsXml = nullptr;
+    custom.fIsolated = true;
+
+    blink::WebFontRendering::setSkiaFontManager(SkFontMgr_New_Android(&custom));
+  }
 }
 
 static bool CreateInitProcessReaper(base::Closure* post_fork_parent_callback) {
   // The current process becomes init(1), this function returns from a
   // newly created process.
   const bool init_created =
       sandbox::CreateInitProcessReaper(post_fork_parent_callback);
   if (!init_created) {
     LOG(ERROR) << "Error creating an init process to reap zombies";
     return false;
@@ skipping 250 matching lines @@
   const bool namespace_sandbox_engaged = sandbox_flags & kSandboxLinuxUserNS;
   CHECK_EQ(using_namespace_sandbox, namespace_sandbox_engaged);
 
   Zygote zygote(sandbox_flags, std::move(fork_delegates), extra_children,
                 extra_fds);
   // This function call can return multiple times, once per fork().
   return zygote.ProcessRequests();
 }
 
 }  // namespace content