Use string for Histogram names since these are all ASCII anyway wide-characte...

chrome/browser/renderer_host/render_widget_host_view_win.cc

 // Copyright (c) 2006-2008 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/renderer_host/render_widget_host_view_win.h"
 
 #include "base/command_line.h"
 #include "base/gfx/gdi_util.h"
 #include "base/gfx/rect.h"
 #include "base/histogram.h"
@@ skipping 506 matching lines @@
       paint_dc.FillRect(&r, white_brush);
     }
     if (!whiteout_start_time_.is_null()) {
       TimeDelta whiteout_duration = TimeTicks::Now() - whiteout_start_time_;
 
       // If field trial is active, report results in special histogram.
       static scoped_refptr<FieldTrial> trial(
           FieldTrialList::Find(BrowserTrial::kMemoryModelFieldTrial));
       if (trial.get()) {
         if (trial->boolean_value())
-          UMA_HISTOGRAM_TIMES(L"MPArch.RWHH_WhiteoutDuration_trial_high_memory",
+          UMA_HISTOGRAM_TIMES("MPArch.RWHH_WhiteoutDuration_trial_high_memory",
                               whiteout_duration);
         else
-          UMA_HISTOGRAM_TIMES(L"MPArch.RWHH_WhiteoutDuration_trial_med_memory",
+          UMA_HISTOGRAM_TIMES("MPArch.RWHH_WhiteoutDuration_trial_med_memory",
                               whiteout_duration);
       } else {
-        UMA_HISTOGRAM_TIMES(L"MPArch.RWHH_WhiteoutDuration", whiteout_duration);
+        UMA_HISTOGRAM_TIMES("MPArch.RWHH_WhiteoutDuration", whiteout_duration);
       }
 
       // Reset the start time to 0 so that we start recording again the next
       // time the backing store is NULL...
       whiteout_start_time_ = TimeTicks();
     }
   } else {
     paint_dc.FillRect(&paint_dc.m_ps.rcPaint, white_brush);
     if (whiteout_start_time_.is_null())
       whiteout_start_time_ = TimeTicks::Now();
@@ skipping 496 matching lines @@
     // WM_LBUTTONDOWN.
     SetFocus();
   }
 }
 
 void RenderWidgetHostViewWin::ShutdownHost() {
   shutdown_factory_.RevokeAll();
   render_widget_host_->Shutdown();
   // Do not touch any members at this point, |this| has been deleted.
 }