Implement HiDPI support in Pepper dev interface

ppapi/thunk/ppb_graphics_2d_thunk.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/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_graphics_2d.h"
+#include "ppapi/c/private/ppb_graphics_2d_private.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_graphics_2d_api.h"
 #include "ppapi/thunk/resource_creation_api.h"
 #include "ppapi/thunk/thunk.h"
 
 namespace ppapi {
 namespace thunk {
 
 namespace {
 
 typedef EnterResource<PPB_Graphics2D_API> EnterGraphics2D;
 
 PP_Resource Create(PP_Instance instance,
                    const PP_Size* size,
                    PP_Bool is_always_opaque) {
   EnterResourceCreation enter(instance);
   if (enter.failed())
     return 0;
-  return enter.functions()->CreateGraphics2D(instance, *size, is_always_opaque);
+  return enter.functions()->CreateGraphics2D(instance,
+                                             *size,
+                                             is_always_opaque,
+                                             1.0f);
+}
+
+PP_Resource CreateWithScale(PP_Instance instance,
+                            const PP_Size* size,
+                            PP_Bool is_always_opaque,
+                            float scale) {
+  EnterResourceCreation enter(instance);
+  if (enter.failed())
+    return 0;
+  return enter.functions()->CreateGraphics2D(instance,
+                                             *size,
+                                             is_always_opaque,
+                                             scale);
 }
 
 PP_Bool IsGraphics2D(PP_Resource resource) {
   EnterGraphics2D enter(resource, false);
   return enter.succeeded() ? PP_TRUE : PP_FALSE;
 }
 
 PP_Bool Describe(PP_Resource graphics_2d,
                  PP_Size* size,
                  PP_Bool* is_always_opaque) {
@@ skipping 44 matching lines @@
 const PPB_Graphics2D g_ppb_graphics_2d_thunk = {
   &Create,
   &IsGraphics2D,
   &Describe,
   &PaintImageData,
   &Scroll,
   &ReplaceContents,
   &Flush
 };
 
+const PPB_Graphics2D_Private g_ppb_graphics_2d_private_thunk = {
+  &CreateWithScale
+};
+
 }  // namespace
 
 const PPB_Graphics2D_1_0* GetPPB_Graphics2D_1_0_Thunk() {
   return &g_ppb_graphics_2d_thunk;
 }
 
+const PPB_Graphics2D_Private_0_1* GetPPB_Graphics2D_Private_0_1_Thunk() {
+  return &g_ppb_graphics_2d_private_thunk;
+}
+
 }  // namespace thunk
 }  // namespace ppapi