Change the screenshot file format not to use colons.

As is suggested in crbug.com/133956 comment chromium#5,
- add " at " between date and time
- use dot instead of colon for time, since colon is not allowed for HFS+/FAT32

BUG=133956, 140355


Review URL: https://chromiumcodereview.appspot.com/10827177

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150216 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/ash/screenshot_taker.cc

@@ -59,11 +59,11 @@ std::string GetScreenShotBaseFilename(bool use_24hour_clock) {
   // for non-English locales.
   // TODO(mukai): integrate this logic somewhere time_formatting.h
   std::string file_name = base::StringPrintf(
-      "Screenshot %d-%02d-%02d ", now.year, now.month, now.day_of_month);
+      "Screenshot %d-%02d-%02d at ", now.year, now.month, now.day_of_month);
 
   if (use_24hour_clock) {
     file_name.append(base::StringPrintf(
-        "%02d:%02d:%02d", now.hour, now.minute, now.second));
+        "%02d.%02d.%02d", now.hour, now.minute, now.second));
   } else {
     int hour = now.hour;
     if (hour > 12) {
@@ -72,7 +72,7 @@ std::string GetScreenShotBaseFilename(bool use_24hour_clock) {
       hour = 12;
     }
     file_name.append(base::StringPrintf(
-        "%d:%02d:%02d ", hour, now.minute, now.second));
+        "%d.%02d.%02d ", hour, now.minute, now.second));
     file_name.append((now.hour >= 12) ? "PM" : "AM");
   }