[headless] Embed pak file into binary.

ui/base/resource/resource_bundle.cc

Index: ui/base/resource/resource_bundle.cc
diff --git a/ui/base/resource/resource_bundle.cc b/ui/base/resource/resource_bundle.cc
index 0f95c9e2e08dfdbeaa388cf67755dbdbc57ca9a6..bfd563382a4723ae198f81434daa234564252a1e 100644
--- a/ui/base/resource/resource_bundle.cc
+++ b/ui/base/resource/resource_bundle.cc
@@ -207,6 +207,14 @@ void ResourceBundle::InitSharedInstanceWithPakPath(const base::FilePath& path) {
 }
 
 // static
+void ResourceBundle::InitSharedInstanceWithPakBuffer(base::StringPiece buffer) {
+  InitSharedInstance(NULL);
+  g_shared_instance_->LoadTestResourcesFromBuffer(buffer, buffer);
+
+  g_shared_instance_->InitDefaultFontList();
+}
+
+// static
 void ResourceBundle::CleanupSharedInstance() {
   if (g_shared_instance_) {
     delete g_shared_instance_;
@@ -352,6 +360,25 @@ void ResourceBundle::LoadTestResources(const base::FilePath& path,
   }
 }
 
+void ResourceBundle::LoadTestResourcesFromBuffer(
+    base::StringPiece data,
+    base::StringPiece locale_data) {
+  is_test_resources_ = true;
+  DCHECK(!ui::GetSupportedScaleFactors().empty());
+  const ScaleFactor scale_factor(ui::GetSupportedScaleFactors()[0]);
+  // Use the given resource pak for both common and localized resources.
+  std::unique_ptr<DataPack> data_pack(new DataPack(scale_factor));
+  if (data_pack->LoadFromBuffer(data))
+    AddDataPack(data_pack.release());
+
+  data_pack.reset(new DataPack(ui::SCALE_FACTOR_NONE));
+  if (data_pack->LoadFromBuffer(locale_data)) {
+    locale_resources_data_.reset(data_pack.release());
+  } else {
+    locale_resources_data_.reset(new DataPack(ui::SCALE_FACTOR_NONE));
+  }
+}
+
 void ResourceBundle::UnloadLocaleResources() {
   locale_resources_data_.reset();
 }