Removing useless Win7 checks + standardize its use

ui/events/blink/web_input_event_builders_win_unittest.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 "base/command_line.h"
 #include "base/win/windows_version.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 #include "ui/display/display.h"
 #include "ui/display/display_switches.h"
 #include "ui/events/blink/web_input_event_builders_win.h"
 #include "ui/events/event_constants.h"
 
 using blink::WebMouseEvent;
 using blink::WebMouseWheelEvent;
 
 namespace ui {
 
 // This test validates that Pixel to DIP conversion occurs as needed in the
 // WebMouseEventBuilder::Build function.
 TEST(WebInputEventBuilderTest, TestMouseEventScale) {
-  if (base::win::GetVersion() < base::win::VERSION_WIN7)
-    return;
-
   display::Display::ResetForceDeviceScaleFactorForTesting();
 
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   command_line->AppendSwitchASCII(switches::kForceDeviceScaleFactor, "2");
 
   // Synthesize a mouse move with x = 300 and y = 200.
   WebMouseEvent mouse_move = ui::WebMouseEventBuilder::Build(
       ::GetDesktopWindow(), WM_MOUSEMOVE, 0, MAKELPARAM(300, 200), 100,
       blink::WebPointerProperties::PointerType::kMouse);
 
   // The WebMouseEvent.position field should be in pixels on return and hence
   // should be the same value as the x and y coordinates passed in to the
   // WebMouseEventBuilder::Build function.
   EXPECT_EQ(300, mouse_move.PositionInWidget().x);
   EXPECT_EQ(200, mouse_move.PositionInWidget().y);
 
   // WebMouseEvent.positionInScreen is calculated in DIPs.
   EXPECT_EQ(150, mouse_move.PositionInScreen().x);
   EXPECT_EQ(100, mouse_move.PositionInScreen().y);
 
   EXPECT_EQ(blink::WebPointerProperties::PointerType::kMouse,
             mouse_move.pointer_type);
 
   command_line->AppendSwitchASCII(switches::kForceDeviceScaleFactor, "1");
   display::Display::ResetForceDeviceScaleFactorForTesting();
 }
 
 }  // namespace ui