Change the cast in base::Location::Hash to uintptr_t.

base/location.h

 // Copyright (c) 2012 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.
 
 #ifndef BASE_LOCATION_H_
 #define BASE_LOCATION_H_
 
 #include <cassert>
 #include <string>
 
@@ skipping 40 matching lines @@
   struct Hash {
     size_t operator()(const Location& location) const {
       // Compute the hash value using file name pointer and line number.
       // No need to use |function_name_| since the other two fields uniquely
       // identify this location.
 
       // The file name will always be uniquely identified by its pointer since
       // it comes from __FILE__, so no need to check the contents of the string.
       // See the definition of FROM_HERE in location.h, and how it is used
       // elsewhere.
-
-      // Due to inconsistent definitions of uint64_t and uintptr_t, casting the
-      // file name pointer to a uintptr_t causes a compiler error for some

[danakj, 2015/12/02 20:49:41]

No more compiler errors? Cool. LGTM

-      // platforms. The solution is to explicitly cast it to a uint64_t.
-      return base::HashPair(reinterpret_cast<uint64_t>(location.file_name()),
+      return base::HashPair(reinterpret_cast<uintptr_t>(location.file_name()),
                             location.line_number());
     }
   };
 
   // Translate the some of the state in this instance into a human readable
   // string with HTML characters in the function names escaped, and append that
   // string to |output|.  Inclusion of the file_name_ and function_name_ are
   // optional, and controlled by the boolean arguments.
   void Write(bool display_filename, bool display_function_name,
              std::string* output) const;
@@ skipping 28 matching lines @@
 
 #define FROM_HERE_WITH_EXPLICIT_FUNCTION(function_name)                        \
     ::tracked_objects::Location(function_name,                                 \
                                 __FILE__,                                      \
                                 __LINE__,                                      \
                                 ::tracked_objects::GetProgramCounter())
 
 }  // namespace tracked_objects
 
 #endif  // BASE_LOCATION_H_