Change the screenshot file format not to use colons.

chrome/browser/ui/ash/screenshot_taker.cc

 // 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.
 
 #include "chrome/browser/ui/ash/screenshot_taker.h"
 
 #include <climits>
 #include <string>
 
 #include "ash/shell.h"
@@ skipping 41 matching lines @@
 FilePath GetScreenshotPath(const FilePath& base_directory,
                            bool use_24hour_clock) {
   base::Time::Exploded now;
   base::Time::Now().LocalExplode(&now);
 
   // We don't use base/i18n/time_formatting.h here because it doesn't
   // support our format.  Don't use ICU either to avoid i18n file names
   // 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) {
       hour -= 12;
     } else if (hour == 0) {
       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");
   }
 
   for (int retry = 0; retry < INT_MAX; retry++) {
     std::string retry_suffix;
     if (retry > 0)
       retry_suffix = base::StringPrintf(" (%d)", retry + 1);
 
     FilePath file_path = base_directory.AppendASCII(
         file_name + retry_suffix + ".png");
@@ skipping 132 matching lines @@
       ash::internal::kShellWindowId_OverlayContainer)->layer();
   parent->Add(visual_feedback_layer_.get());
   visual_feedback_layer_->SetVisible(true);
 
   MessageLoopForUI::current()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&ScreenshotTaker::CloseVisualFeedbackLayer,
                  base::Unretained(this)),
       base::TimeDelta::FromMilliseconds(kVisualFeedbackLayerDisplayTimeMs));
 }