Ensure that the DirectWrite font cache works in Chrome canary on Windows 8+ with AppContainer prote…

base/memory/shared_memory.h

Index: base/memory/shared_memory.h
diff --git a/base/memory/shared_memory.h b/base/memory/shared_memory.h
index d76e01c6e57612024fe35dc7c430229d89cd5112..8b3fcf0b403c6f69afe4ddc21536a2dc20052c75 100644
--- a/base/memory/shared_memory.h
+++ b/base/memory/shared_memory.h
@@ -200,6 +200,14 @@ class BASE_EXPORT SharedMemory {
   SharedMemoryId id() const { return inode_; }
 #endif
 
+#if defined(OS_WIN)
+  // Allows the caller to specify if the underlying handle to the shared memory
+  // section is inheritable.
+  void set_inheritable(bool inheritable) {
+    inheritable_ = inheritable;
+  }
+#endif
+
   // Closes the open shared memory segment. The memory will remain mapped if
   // it was previously mapped.
   // It is safe to call Close repeatedly.
@@ -286,6 +294,8 @@ class BASE_EXPORT SharedMemory {
 #if defined(OS_WIN)
   std::wstring       name_;
   HANDLE             mapped_file_;
+  // Indicates if the shared memory handle is inhertiable. Defaults to false.
+  bool               inheritable_;
 #elif defined(OS_POSIX)
   int                mapped_file_;
   int                readonly_mapped_file_;