Use L###macro_arg instead of L#macro_arg to make a wide string literal

MSVC lexes L#macro_arg as a single wide string literal after
pre-processing.  Clang and other conforming C preprocessors lex this as
a single 'L' token followed by a normal string literal.  Using
L###macro_arg works with all compilers.  It should be parsed as 'L' '##'
'#' 'macro_arg', where '#' stringizes the macro arg and '##' token
pastes the two tokens together to form a single string literal.

R=dtseng@chromium.org
CC=thakis@chromium.org,hans@chromium.org
BUG=82385

Review URL: https://codereview.chromium.org/342773004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278299 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/accessibility/accessibility_tree_formatter_utils_win.cc

@@ -42,11 +42,11 @@ AccessibilityRoleStateMap* AccessibilityRoleStateMap::GetInstance() {
 
 AccessibilityRoleStateMap::AccessibilityRoleStateMap() {
 // Convenience macros for generating readable strings.
-#define IA_ROLE_MAP(x) ia_role_string_map[x] = L#x;  \
-                       ia2_role_string_map[x] = L#x;
-#define IA2_ROLE_MAP(x) ia2_role_string_map[x] = L#x;
-#define IA_STATE_MAP(x) ia_state_string_map[STATE_SYSTEM_##x] = L#x;
-#define IA2_STATE_MAP(x) ia2_state_string_map[x] = L#x;
+#define IA_ROLE_MAP(x) ia_role_string_map[x] = L###x;  \
+                       ia2_role_string_map[x] = L###x;
+#define IA2_ROLE_MAP(x) ia2_role_string_map[x] = L###x;
+#define IA_STATE_MAP(x) ia_state_string_map[STATE_SYSTEM_##x] = L###x;
+#define IA2_STATE_MAP(x) ia2_state_string_map[x] = L###x;
 
   // MSAA / IAccessible roles. Each one of these is also a valid
   // IAccessible2 role, the IA_ROLE_MAP macro adds it to both.