Make GRIT not to generate const struct members

chrome.dll:
       .text:      16 bytes change
      .rdata:   25376 bytes change
       .data:  -25536 bytes change
      .reloc:     128 bytes change
Total change:     -16 bytes

BUG=677351

Review-Url: https://codereview.chromium.org/2685073002
Cr-Commit-Position: refs/heads/master@{#453145}

tools/grit/grit/format/resource_map.py

@@ -56,7 +56,7 @@ def _FormatHeader(root, lang='en', output_dir='.'):
 #ifndef GRIT_RESOURCE_MAP_STRUCT_
 #define GRIT_RESOURCE_MAP_STRUCT_
 struct GritResourceMap {
-  const char* const name;
+  const char* name;
   int value;
 };
 #endif // GRIT_RESOURCE_MAP_STRUCT_

tools/grit/grit/format/resource_map_unittest.py

@@ -58,7 +58,7 @@ class FormatResourceMapUnittest(unittest.TestCase):
 #ifndef GRIT_RESOURCE_MAP_STRUCT_
 #define GRIT_RESOURCE_MAP_STRUCT_
 struct GritResourceMap {
-  const char* const name;
+  const char* name;
   int value;
 };
 #endif // GRIT_RESOURCE_MAP_STRUCT_
@@ -150,7 +150,7 @@ const size_t kTheRcHeaderSize = arraysize(kTheRcHeader);''', output)
 #ifndef GRIT_RESOURCE_MAP_STRUCT_
 #define GRIT_RESOURCE_MAP_STRUCT_
 struct GritResourceMap {
-  const char* const name;
+  const char* name;
   int value;
 };
 #endif // GRIT_RESOURCE_MAP_STRUCT_
@@ -235,7 +235,7 @@ const size_t kTheRcHeaderSize = arraysize(kTheRcHeader);''', output)
 #ifndef GRIT_RESOURCE_MAP_STRUCT_
 #define GRIT_RESOURCE_MAP_STRUCT_
 struct GritResourceMap {
-  const char* const name;
+  const char* name;
   int value;
 };
 #endif // GRIT_RESOURCE_MAP_STRUCT_
@@ -313,7 +313,7 @@ const size_t kTheRcHeaderSize = arraysize(kTheRcHeader);''', output)
 #ifndef GRIT_RESOURCE_MAP_STRUCT_
 #define GRIT_RESOURCE_MAP_STRUCT_
 struct GritResourceMap {
-  const char* const name;
+  const char* name;
   int value;
 };
 #endif // GRIT_RESOURCE_MAP_STRUCT_