[headless] Embed pak file into binary.

ui/base/resource/data_pack.h

Index: ui/base/resource/data_pack.h
diff --git a/ui/base/resource/data_pack.h b/ui/base/resource/data_pack.h
index 26b94c2b4b7c98670a8eb418f9c927a3c21f84bc..ba8d8bb212f68c32c7c954360f51fc840455b24b 100644
--- a/ui/base/resource/data_pack.h
+++ b/ui/base/resource/data_pack.h
@@ -33,6 +33,8 @@ enum ScaleFactor : int;
 
 class UI_DATA_PACK_EXPORT DataPack : public ResourceHandle {
  public:
+  class DataSource;

[sky, 2017/02/08 22:22:58]

Move to private section.

[altimin, 2017/02/09 00:13:52]

Done.

+
   explicit DataPack(ui::ScaleFactor scale_factor);
   ~DataPack() override;
 
@@ -46,6 +48,10 @@ class UI_DATA_PACK_EXPORT DataPack : public ResourceHandle {
   bool LoadFromFileRegion(base::File file,
                           const base::MemoryMappedFile::Region& region);
 
+  // Loads a pack file from |buffer|, returning false on error.
+  // Data is not copied, |buffer| should stay alive during |DataPack| lifetime.
+  bool LoadFromBuffer(base::StringPiece buffer);
+
   // Writes a pack file containing |resources| to |path|. If there are any
   // text resources to be written, their encoding must already agree to the
   // |textEncodingType| specified. If no text resources are present, please
@@ -70,11 +76,11 @@ class UI_DATA_PACK_EXPORT DataPack : public ResourceHandle {
 #endif
 
  private:
-  // Does the actual loading of a pack file. Called by Load and LoadFromFile.
+  // Does the actual loading of a pack file.
+  // Called by Load and LoadFromFile and LoadFromBuffer.
   bool LoadImpl();
 
-  // The memory-mapped data.
-  std::unique_ptr<base::MemoryMappedFile> mmap_;
+  std::unique_ptr<DataSource> data_source_;
 
   // Number of resources in the data.
   size_t resource_count_;