Reland: Fix slop region boundary handling.

content/browser/renderer_host/render_widget_host_view_aura_unittest.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/memory/shared_memory.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 1784 matching lines @@
 
   const IPC::Message *message = sink_->GetFirstMessageMatching(
       ViewMsg_Resize::ID);
   ASSERT_TRUE(message != NULL);
 
   ViewMsg_Resize::Param params;
   ViewMsg_Resize::Read(message, &params);
   EXPECT_EQ(60, params.a.visible_viewport_size.height());
 }
 
+// Ensures that touch event positions are never truncated to integers.
+TEST_F(RenderWidgetHostViewAuraTest, TouchEventPositionsArentRounded) {
+  const float kX = 30.58f;
+  const float kY = 50.23f;
+
+  view_->InitAsChild(NULL);
+  view_->Show();
+
+  ui::TouchEvent press(ui::ET_TOUCH_PRESSED,
+                       gfx::PointF(kX, kY),
+                       0,
+                       ui::EventTimeForNow());
+
+  view_->OnTouchEvent(&press);
+  EXPECT_EQ(blink::WebInputEvent::TouchStart, view_->touch_event_.type);
+  EXPECT_TRUE(view_->touch_event_.cancelable);
+  EXPECT_EQ(1U, view_->touch_event_.touchesLength);
+  EXPECT_EQ(blink::WebTouchPoint::StatePressed,
+            view_->touch_event_.touches[0].state);
+  EXPECT_EQ(kX, view_->touch_event_.touches[0].screenPosition.x);
+  EXPECT_EQ(kX, view_->touch_event_.touches[0].position.x);
+  EXPECT_EQ(kY, view_->touch_event_.touches[0].screenPosition.y);
+  EXPECT_EQ(kY, view_->touch_event_.touches[0].position.y);
+}
+
 // Tests that scroll ACKs are correctly handled by the overscroll-navigation
 // controller.
 TEST_F(RenderWidgetHostViewAuraOverscrollTest, WheelScrollEventOverscrolls) {
   SetUpOverscrollEnvironment();
 
   // Simulate wheel events.
   SimulateWheelEvent(-5, 0, 0, true);    // sent directly
   SimulateWheelEvent(-1, 1, 0, true);    // enqueued
   SimulateWheelEvent(-10, -3, 0, true);  // coalesced into previous event
   SimulateWheelEvent(-15, -1, 0, true);  // coalesced into previous event
@@ skipping 848 matching lines @@
   EXPECT_EQ(OVERSCROLL_NONE, overscroll_delegate()->completed_mode());
 
   SimulateGestureEvent(WebInputEvent::GestureScrollEnd,
                        blink::WebGestureDeviceTouchscreen);
   EXPECT_EQ(OVERSCROLL_NONE, overscroll_delegate()->current_mode());
   EXPECT_EQ(OVERSCROLL_EAST, overscroll_delegate()->completed_mode());
   EXPECT_EQ(3U, sink_->message_count());
 }
 
 }  // namespace content