Implementation of dwrite font proxy and removal of dwrite font cache

content/common/sandbox_win.cc

Index: content/common/sandbox_win.cc
diff --git a/content/common/sandbox_win.cc b/content/common/sandbox_win.cc
index d8689bc71901ec4221f624624125a7596059faa0..88e79494be985f14d3d5396deb3a2649af0f7241 100644
--- a/content/common/sandbox_win.cc
+++ b/content/common/sandbox_win.cc
@@ -27,7 +27,6 @@
 #include "content/common/content_switches_internal.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
-#include "content/public/common/dwrite_font_platform_win.h"
 #include "content/public/common/sandbox_init.h"
 #include "content/public/common/sandboxed_process_launcher_delegate.h"
 #include "sandbox/win/src/process_mitigations.h"
@@ -723,22 +722,6 @@ base::Process StartSandboxedProcess(
                   true,
                   sandbox::TargetPolicy::FILES_ALLOW_READONLY,
                   policy);
-
-      // If DirectWrite is enabled for font rendering then open the font cache
-      // section which is created by the browser and pass the handle to the
-      // renderer process. This is needed because renderer processes on
-      // Windows 8+ may be running in an AppContainer sandbox and hence their
-      // kernel object namespace may be partitioned.
-      std::string name(content::kFontCacheSharedSectionName);
-      name.append(base::UintToString(base::GetCurrentProcId()));
-
-      base::SharedMemory direct_write_font_cache_section;
-      if (direct_write_font_cache_section.Open(name, true)) {
-        void* shared_handle = policy->AddHandleToShare(
-            direct_write_font_cache_section.handle().GetHandle());
-        cmd_line->AppendSwitchASCII(switches::kFontCacheSharedHandle,
-            base::UintToString(reinterpret_cast<unsigned int>(shared_handle)));
-      }
     }
   }
 #endif