[Remoting Android] Use floating point coords for rendering the cursor

remoting/client/gl_cursor_feedback.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.
 
 #include "remoting/client/gl_cursor_feedback.h"
 
 #include <math.h>
 #include <array>
 
 #include "base/logging.h"
@@ skipping 18 matching lines @@
     layer_.reset();
     return;
   }
   layer_.reset(new GlRenderLayer(kGlCursorFeedbackTextureId, canvas));
   GlCursorFeedbackTexture* texture = GlCursorFeedbackTexture::GetInstance();
   layer_->SetTexture(texture->GetTexture().data(),
                      GlCursorFeedbackTexture::kTextureWidth,
                      GlCursorFeedbackTexture::kTextureWidth, 0);
 }
 
-void GlCursorFeedback::StartAnimation(int x, int y, float diameter) {
+void GlCursorFeedback::StartAnimation(float x, float y, float diameter) {
   cursor_x_ = x;
   cursor_y_ = y;
   max_diameter_ = diameter;
   animation_start_time_ = base::TimeTicks::Now();
 }
 
 bool GlCursorFeedback::Draw() {
   if (!layer_ || animation_start_time_.is_null()) {
     return false;
   }
   float progress =
       (base::TimeTicks::Now() - animation_start_time_).InMilliseconds() /
       kAnimationDurationMs;
   if (progress > 1) {
     animation_start_time_ = base::TimeTicks();
     return false;
   }
   float diameter = progress * max_diameter_;
   std::array<float, 8> positions;
   FillRectangleVertexPositions(cursor_x_ - diameter / 2,
                                cursor_y_ - diameter / 2,
                                diameter, diameter, &positions);
   layer_->SetVertexPositions(positions);
   layer_->Draw(1.f - progress);
   return true;
 }
 
 }  // namespace remoting