Revert 171408

ppapi/proxy/serialized_structs.h

Index: ppapi/proxy/serialized_structs.h
diff --git a/ppapi/proxy/serialized_structs.h b/ppapi/proxy/serialized_structs.h
index def852fe14b3b943233474e873fee62736de0b4d..d27b52cded123a2f4a337e581039d8c1889681a8 100644
--- a/ppapi/proxy/serialized_structs.h
+++ b/ppapi/proxy/serialized_structs.h
@@ -85,7 +85,7 @@ struct PPBURLLoader_UpdateProgress_Params {
 // them in NaClIPCAdapter for use in NaCl.
 class PPAPI_PROXY_EXPORT SerializedHandle {
  public:
-  enum Type { INVALID, SHARED_MEMORY, SOCKET, CHANNEL_HANDLE, FILE };
+  enum Type { INVALID, SHARED_MEMORY, SOCKET, CHANNEL_HANDLE };
   struct Header {
     Header() : type(INVALID), size(0) {}
     Header(Type type_arg, uint32_t size_arg)
@@ -102,7 +102,7 @@ class PPAPI_PROXY_EXPORT SerializedHandle {
   // Create a shared memory handle.
   SerializedHandle(const base::SharedMemoryHandle& handle, uint32_t size);
 
-  // Create a socket, channel or file handle.
+  // Create a socket or channel handle.
   SerializedHandle(const Type type,
                    const IPC::PlatformFileForTransit& descriptor);
 
@@ -110,7 +110,6 @@ class PPAPI_PROXY_EXPORT SerializedHandle {
   bool is_shmem() const { return type_ == SHARED_MEMORY; }
   bool is_socket() const { return type_ == SOCKET; }
   bool is_channel_handle() const { return type_ == CHANNEL_HANDLE; }
-  bool is_file() const { return type_ == FILE; }
   const base::SharedMemoryHandle& shmem() const {
     DCHECK(is_shmem());
     return shm_handle_;
@@ -120,7 +119,7 @@ class PPAPI_PROXY_EXPORT SerializedHandle {
     return size_;
   }
   const IPC::PlatformFileForTransit& descriptor() const {
-    DCHECK(is_socket() || is_channel_handle() || is_file());
+    DCHECK(is_socket() || is_channel_handle());
     return descriptor_;
   }
   void set_shmem(const base::SharedMemoryHandle& handle, uint32_t size) {
@@ -144,13 +143,6 @@ class PPAPI_PROXY_EXPORT SerializedHandle {
     shm_handle_ = base::SharedMemory::NULLHandle();
     size_ = 0;
   }
-  void set_file_handle(const IPC::PlatformFileForTransit& descriptor) {
-    type_ = FILE;
-
-    descriptor_ = descriptor;
-    shm_handle_ = base::SharedMemory::NULLHandle();
-    size_ = 0;
-  }
   void set_null_shmem() {
     set_shmem(base::SharedMemory::NULLHandle(), 0);
   }
@@ -160,9 +152,6 @@ class PPAPI_PROXY_EXPORT SerializedHandle {
   void set_null_channel_handle() {
     set_channel_handle(IPC::InvalidPlatformFileForTransit());
   }
-  void set_null_file_handle() {
-    set_file_handle(IPC::InvalidPlatformFileForTransit());
-  }
   bool IsHandleValid() const;
 
   Header header() const {