win: Remove GetModuleFromAddress, deduplicate __ImageBase code.

base/process/memory_win.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/process/memory.h"
 
 #include <new.h>
 #include <psapi.h>
 #include <stddef.h>
 
@@ skipping 42 matching lines @@
 void EnableTerminationOnHeapCorruption() {
   // Ignore the result code. Supported on XP SP3 and Vista.
   HeapSetInformation(NULL, HeapEnableTerminationOnCorruption, NULL, 0);
 }
 
 void EnableTerminationOnOutOfMemory() {
   _set_new_handler(&OnNoMemory);
   _set_new_mode(1);
 }
 
-HMODULE GetModuleFromAddress(void* address) {
-  HMODULE instance = NULL;
-  if (!::GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
-                            GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
-                            static_cast<char*>(address),
-                            &instance)) {
-    NOTREACHED();
-  }
-  return instance;
-}
-
 // Implemented using a weak symbol.
 bool UncheckedMalloc(size_t size, void** result) {
   *result = malloc_unchecked(size);
   return *result != NULL;
 }
 
 }  // namespace base