Avoid lossy effects of rounding by using contentBoxRect directly for plugin bounds.

chrome/test/data/nacl/ppapi/ppp_instance/ppapi_ppp_instance.cc

 // Copyright 2013 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 <stdint.h>
 #include <string.h>
 
 #include <vector>
 
 #include "chrome/test/data/nacl/ppapi_test_lib/get_browser_interface.h"
@@ skipping 31 matching lines @@
   printf("--- PPP_Instance::DidChangeView\n");
   EXPECT(instance == pp_instance());
 
   PP_Rect clip;
   PPBView()->GetClipRect(view, &clip);
   EXPECT(clip.point.x == 0 && clip.point.y == 0);
 
   // These are based on embed dimensions.
   PP_Rect position;
   PPBView()->GetRect(view, &position);
-  fprintf(stderr, "clip.size.height: %d\n", clip.size.height);
   EXPECT(position.size.width == 15 && clip.size.width == 15);
-  EXPECT(position.size.height == 20 && clip.size.height == 21);
+  EXPECT(position.size.height == 20 && clip.size.height == 20);
 
   TEST_PASSED;
 }
 
 void DidChangeFocus(PP_Instance instance,
                     PP_Bool has_focus) {
   printf("--- PPP_Instance::DidChangeFocus has_focus=%d\n", has_focus);
   // There should be no focus on load, so this will trigger when we gain it
   // and then release it and so on.
   static bool expected_has_focus = true;
@@ skipping 23 matching lines @@
 }  // namespace
 
 
 void SetupTests() {
   // Each PPP_Instance function called by the browser acts as a test.
 }
 
 void SetupPluginInterfaces() {
   RegisterPluginInterface(PPP_INSTANCE_INTERFACE, &ppp_instance_interface);
 }