ash: Clean up naming of paint-related identifiers

ash/common/accelerators/exit_warning_handler.cc

 // Copyright 2013 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 "ash/common/accelerators/exit_warning_handler.h"
 
 #include "ash/common/shell_delegate.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
 #include "ash/public/cpp/shell_window_ids.h"
@@ skipping 55 matching lines @@
     label->SetSubpixelRenderingEnabled(false);
     AddChildView(label);
     SetLayoutManager(new views::FillLayout);
   }
 
   gfx::Size GetPreferredSize() const override {
     return gfx::Size(width_, height_);
   }
 
   void OnPaint(gfx::Canvas* canvas) override {
-    cc::PaintFlags paint;
-    paint.setStyle(cc::PaintFlags::kFill_Style);
-    paint.setColor(kWindowBackgroundColor);
-    canvas->DrawRoundRect(GetLocalBounds(), kWindowCornerRadius, paint);
+    cc::PaintFlags flags;
+    flags.setStyle(cc::PaintFlags::kFill_Style);
+    flags.setColor(kWindowBackgroundColor);
+    canvas->DrawRoundRect(GetLocalBounds(), kWindowCornerRadius, flags);
     views::WidgetDelegateView::OnPaint(canvas);
   }
 
   void GetAccessibleNodeData(ui::AXNodeData* node_data) override {
     node_data->SetName(accessible_name_);
     node_data->role = ui::AX_ROLE_ALERT;
   }
 
  private:
   base::string16 text_;
@@ skipping 79 matching lines @@
   widget_->Show();
 
   delegate->NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
 }
 
 void ExitWarningHandler::Hide() {
   widget_.reset();
 }
 
 }  // namespace ash