Fix precision problem in TouchActionBrowserTest.

content/browser/renderer_host/input/touch_action_browsertest.cc

 // Copyright 2014 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 <utility>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/macros.h"
@@ skipping 147 matching lines @@
                    base::Unretained(this)));
 
     // Runs until we get the OnSyntheticGestureCompleted callback
     runner_->Run();
     runner_ = NULL;
 
     // Expect that the compositor scrolled at least one pixel while the
     // main thread was in a busy loop.
     while (wait_until_scrolled &&
            frame_watcher->LastMetadata().root_scroll_offset.y() <
-               distance.y()) {
+               (distance.y() / 2)) {
       frame_watcher->WaitFrames(1);
     }
 
     // Check the scroll offset
     int scrollTop = GetScrollTop();
     if (scrollTop == 0)
       return false;
 
     // Allow for 1px rounding inaccuracies for some screen sizes.
-    EXPECT_NEAR(distance.y(), scrollTop, 1);
+    EXPECT_LT(distance.y() / 2, scrollTop);
     return true;
   }
 
  private:
   scoped_refptr<MessageLoopRunner> runner_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchActionBrowserTest);
 };
 
 // Mac doesn't yet have a gesture recognizer, so can't support turning touch
@@ skipping 34 matching lines @@
       DoTouchScroll(gfx::Point(50, 150), gfx::Vector2d(0, 45), false);
   EXPECT_FALSE(scrolled);
 
   EXPECT_EQ(1, ExecuteScriptAndExtractInt("eventCounts.touchstart"));
   EXPECT_GE(ExecuteScriptAndExtractInt("eventCounts.touchmove"), 1);
   EXPECT_EQ(1, ExecuteScriptAndExtractInt("eventCounts.touchend"));
   EXPECT_EQ(0, ExecuteScriptAndExtractInt("eventCounts.touchcancel"));
 }
 
 }  // namespace content