Load v8 snapshots directly from APK (and store them uncompressed)

chrome/browser/chrome_content_browser_client.h

Index: chrome/browser/chrome_content_browser_client.h
diff --git a/chrome/browser/chrome_content_browser_client.h b/chrome/browser/chrome_content_browser_client.h
index 89f7b2231df55e6944cadf2fbd1804afd7e54e08..287a63c599f2bedfb851adf588f74f9392973c1d 100644
--- a/chrome/browser/chrome_content_browser_client.h
+++ b/chrome/browser/chrome_content_browser_client.h
@@ -16,6 +16,7 @@
 #include "base/memory/weak_ptr.h"
 #include "chrome/common/chrome_version_info.h"
 #include "content/public/browser/content_browser_client.h"
+#include "gin/v8_initializer.h"
 
 class ChromeContentBrowserClientParts;
 
@@ -243,7 +244,11 @@ class ChromeContentBrowserClient : public content::ContentBrowserClient {
   void GetAdditionalMappedFilesForChildProcess(
       const base::CommandLine& command_line,
       int child_process_id,
-      content::FileDescriptorInfo* mappings) override;
+      content::FileDescriptorInfo* mappings
+#if defined(OS_ANDROID)
+      , std::map<int, base::MemoryMappedFile::Region>* regions
+#endif
+      ) override;
 #endif
 #if defined(OS_WIN)
   const wchar_t* GetResourceDllName() override;
@@ -291,6 +296,10 @@ class ChromeContentBrowserClient : public content::ContentBrowserClient {
       const base::Callback<void(bool)>& callback);
 #endif
 
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
+  void LazyPrepV8StartupData();
+#endif
+
 #if defined(ENABLE_PLUGINS)
   // Set of origins that can use TCP/UDP private APIs from NaCl.
   std::set<std::string> allowed_socket_origins_;
@@ -302,8 +311,7 @@ class ChromeContentBrowserClient : public content::ContentBrowserClient {
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
-  base::ScopedFD v8_natives_fd_;
-  base::ScopedFD v8_snapshot_fd_;
+  gin::V8Initializer::V8Files v8_files_;
 #endif  // OS_POSIX && !OS_MACOSX
 
   // Vector of additional ChromeContentBrowserClientParts.