Revert of SkScalarMul is deprecated

components/exo/wayland/clients/motion_events.cc

 // Copyright 2016 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.
 
 // Implementation of a client that produces output in the form of RGBA
 // buffers when receiving pointer/touch events. RGB contains the lower
 // 24 bits of the event timestamp and A is 0xff.
 
 #include <fcntl.h>
 #include <linux-dmabuf-unstable-v1-client-protocol.h>
@@ skipping 702 matching lines @@
           y += h;
         }
       }
 
       // Draw rotating rects.
       SkScalar half_width = SkScalarHalf(width_);
       SkScalar half_height = SkScalarHalf(height_);
       SkIRect rect = SkIRect::MakeXYWH(-SkScalarHalf(half_width),
                                        -SkScalarHalf(half_height), half_width,
                                        half_height);
-      SkScalar rotation = schedule.time * kRotationSpeed / 1000;
+      SkScalar rotation = SkScalarMulDiv(schedule.time, kRotationSpeed, 1000);
       canvas->save();
       canvas->translate(half_width, half_height);
       for (size_t i = 0; i < num_rects_; ++i) {
         const SkColor kColors[] = {SK_ColorBLUE, SK_ColorGREEN,
                                    SK_ColorRED,  SK_ColorYELLOW,
                                    SK_ColorCYAN, SK_ColorMAGENTA};
         SkPaint paint;
         paint.setColor(SkColorSetA(kColors[i % arraysize(kColors)], 0xA0));
         canvas->rotate(rotation / num_rects_);
         canvas->drawIRect(rect, paint);
@@ skipping 260 matching lines @@
         new std::string(command_line->GetSwitchValueASCII(switches::kUseDrm)));
   }
 
   exo::wayland::clients::MotionEvents client(
       width, height, scale, num_rects, max_frames_pending,
       command_line->HasSwitch(switches::kFullscreen),
       command_line->HasSwitch(switches::kShowFpsCounter), num_benchmark_runs,
       base::TimeDelta::FromMilliseconds(benchmark_interval_ms), use_drm.get());
   return client.Run();
 }