Add a query function for the scaling feature.

ppapi/tests/test_graphics_2d.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 "ppapi/tests/test_graphics_2d.h"
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "ppapi/c/dev/ppb_testing_dev.h"
@@ skipping 614 matching lines @@
     } else {
       if (rv == PP_OK || rv == PP_OK_COMPLETIONPENDING)
         return "Second flush succeeded before callback ran.";
     }
   }
 
   PASS();
 }
 
 std::string TestGraphics2D::TestDev() {
-  // Tests GetScale/SetScale via the Graphics2DDev C++ wrapper
+  // Tests GetScale/SetScale via the Graphics2D_Dev C++ wrapper
   const int w=20, h=16;
   const float scale=1.0f/2.0f;
   pp::Graphics2D dc(instance_, pp::Size(w, h), false);
   if (dc.is_null())
     return "Failure creating a boring device";
-  pp::Graphics2DDev dc_dev(dc);
+  pp::Graphics2D_Dev dc_dev(dc);
   if (dc_dev.GetScale() != 1.0f)
     return "GetScale returned unexpected value before SetScale";
   if (!dc_dev.SetScale(scale))
     return "SetScale failed";
   if (dc_dev.GetScale() != scale)
     return "GetScale mismatch with prior SetScale";
   // Try setting a few invalid scale factors. Ensure that we catch these errors
   // and don't change the actual scale
   if (dc_dev.SetScale(-1.0f))
     return "SetScale(-1f) did not fail";
@@ skipping 10 matching lines @@
   PP_Bool is_always_opaque = PP_FALSE;
   if (!graphics_2d_interface_->Describe(dc_dev.pp_resource(), &size,
                                         &is_always_opaque))
     return "Describe failed";
   if (size.width != w || size.height != h ||
       is_always_opaque != PP_FromBool(false))
     return "Mismatch of data.";
 
   PASS();
 }