Remove no-op grace area touch calibration code

BUG=None
TEST=None

Review URL: https://codereview.chromium.org/872033002

Cr-Commit-Position: refs/heads/master@{#318993}

ui/aura/window_tree_host_x11.cc

@@ -150,38 +150,15 @@ class TouchEventCalibrate : public ui::PlatformEventObserver {
 
     const int resolution_x = bounds.width();
     const int resolution_y = bounds.height();
-    // The "grace area" (10% in this case) is to make it easier for the user to
-    // navigate to the corner.
-    const double kGraceAreaFraction = 0.1;
     if (left_ || right_) {
       // Offset the x position to the real
       x -= left_;
-      // Check if we are in the grace area of the left side.
-      // Note: We might not want to do this when the gesture is locked?
-      if (x < 0 && x > -left_ * kGraceAreaFraction)
-        x = 0;
-      // Check if we are in the grace area of the right side.
-      // Note: We might not want to do this when the gesture is locked?
-      if (x > resolution_x - left_ &&
-          x < resolution_x - left_ + right_ * kGraceAreaFraction)
-        x = resolution_x - left_;
       // Scale the screen area back to the full resolution of the screen.
       x = (x * resolution_x) / (resolution_x - (right_ + left_));
     }
     if (top_ || bottom_) {
       // When there is a top bezel we add our border,
       y -= top_;
-
-      // Check if we are in the grace area of the top side.
-      // Note: We might not want to do this when the gesture is locked?
-      if (y < 0 && y > -top_ * kGraceAreaFraction)
-        y = 0;
-
-      // Check if we are in the grace area of the bottom side.
-      // Note: We might not want to do this when the gesture is locked?
-      if (y > resolution_y - top_ &&
-          y < resolution_y - top_ + bottom_ * kGraceAreaFraction)
-        y = resolution_y - top_;
       // Scale the screen area back to the full resolution of the screen.
       y = (y * resolution_y) / (resolution_y - (bottom_ + top_));
     }