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

chrome/browser/renderer_host/render_widget_host.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.h"
 
 #include "base/gfx/native_widget_types.h"
 #include "base/message_loop.h"
 #include "base/keyboard_codes.h"
 #include "chrome/browser/renderer_host/backing_store.h"
@@ skipping 400 matching lines @@
   if (is_resize_ack) {
     DCHECK(resize_ack_pending_);
     resize_ack_pending_ = false;
   }
 
   bool is_repaint_ack =
       ViewHostMsg_PaintRect_Flags::is_repaint_ack(params.flags);
   if (is_repaint_ack) {
     repaint_ack_pending_ = false;
     TimeDelta delta = TimeTicks::Now() - repaint_start_time_;
-    UMA_HISTOGRAM_TIMES(L"MPArch.RWH_RepaintDelta", delta);
+    UMA_HISTOGRAM_TIMES("MPArch.RWH_RepaintDelta", delta);
   }
 
   DCHECK(!params.bitmap_rect.IsEmpty());
   DCHECK(!params.view_size.IsEmpty());
 
   const size_t size = params.bitmap_rect.height() *
                       params.bitmap_rect.width() * 4;
   TransportDIB* dib = process_->GetTransportDIB(params.bitmap);
   if (dib) {
     if (dib->size() < size) {
@@ skipping 36 matching lines @@
   if (is_resize_ack && view_) {
     gfx::Rect view_bounds = view_->GetViewBounds();
     if (current_size_.width() != view_bounds.width() ||
         current_size_.height() != view_bounds.height()) {
       WasResized();
     }
   }
 
   // Log the time delta for processing a paint message.
   TimeDelta delta = TimeTicks::Now() - paint_start;
-  UMA_HISTOGRAM_TIMES(L"MPArch.RWH_OnMsgPaintRect", delta);
+  UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgPaintRect", delta);
 }
 
 void RenderWidgetHost::OnMsgScrollRect(
     const ViewHostMsg_ScrollRect_Params& params) {
   TimeTicks scroll_start = TimeTicks::Now();
 
   DCHECK(!params.view_size.IsEmpty());
 
   const size_t size = params.bitmap_rect.height() *
                       params.bitmap_rect.width() * 4;
@@ skipping 25 matching lines @@
   // Paint the view. Watch out: it might be destroyed already.
   if (view_) {
     view_being_painted_ = true;
     view_->MovePluginWindows(params.plugin_window_moves);
     view_->DidScrollRect(params.clip_rect, params.dx, params.dy);
     view_being_painted_ = false;
   }
 
   // Log the time delta for processing a scroll message.
   TimeDelta delta = TimeTicks::Now() - scroll_start;
-  UMA_HISTOGRAM_TIMES(L"MPArch.RWH_OnMsgScrollRect", delta);
+  UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgScrollRect", delta);
 }
 
 void RenderWidgetHost::OnMsgInputEventAck(const IPC::Message& message) {
   // Log the time delta for processing an input event.
   TimeDelta delta = TimeTicks::Now() - input_event_start_time_;
-  UMA_HISTOGRAM_TIMES(L"MPArch.RWH_InputEventDelta", delta);
+  UMA_HISTOGRAM_TIMES("MPArch.RWH_InputEventDelta", delta);
 
   // Cancel pending hung renderer checks since the renderer is responsive.
   StopHangMonitorTimeout();
 
   void* iter = NULL;
   int type = 0;
   bool r = message.ReadInt(&iter, &type);
   DCHECK(r);
 
   if (type == WebInputEvent::MOUSE_MOVE) {
@@ skipping 84 matching lines @@
 
   // TODO(darin): do we need to do something else if our backing store is not
   // the same size as the advertised view?  maybe we just assume there is a
   // full paint on its way?
   BackingStore* backing_store = BackingStoreManager::Lookup(this);
   if (!backing_store || (backing_store->size() != view_size))
     return;
   backing_store->ScrollRect(process_->process().handle(), bitmap, bitmap_rect,
                             dx, dy, clip_rect, view_size);
 }