Updating Gamepad API to match latest spec

ppapi/shared_impl/ppb_gamepad_shared.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/shared_impl/ppb_gamepad_shared.h"
 
 #include "base/basictypes.h"
 
 namespace ppapi {
 
 void ConvertWebKitGamepadData(const WebKitGamepads& webkit_data,
                               PP_GamepadsSampleData* output_data) {
   output_data->length = webkit_data.length;
   for (unsigned i = 0; i < webkit_data.length; ++i) {
     PP_GamepadSampleData& output_pad = output_data->items[i];
     const WebKitGamepad& webkit_pad = webkit_data.items[i];
     output_pad.connected = webkit_pad.connected ? PP_TRUE : PP_FALSE;
     if (webkit_pad.connected) {
       COMPILE_ASSERT(sizeof(output_pad.id) == sizeof(webkit_pad.id),
                      id_size_does_not_match);
       COMPILE_ASSERT(sizeof(output_pad.axes) == sizeof(webkit_pad.axes),
                      axes_size_does_not_match);
-      COMPILE_ASSERT(sizeof(output_pad.buttons) == sizeof(webkit_pad.buttons),
-                     buttons_size_does_not_match);
       memcpy(output_pad.id, webkit_pad.id, sizeof(output_pad.id));
       output_pad.timestamp = webkit_pad.timestamp;
       output_pad.axes_length = webkit_pad.axes_length;
       memcpy(output_pad.axes, webkit_pad.axes, sizeof(output_pad.axes));
       output_pad.buttons_length = webkit_pad.buttons_length;
-      memcpy(output_pad.buttons,
-             webkit_pad.buttons,
-             sizeof(output_pad.buttons));
+      // Can't memcpy because buttons are different types
+      for (unsigned j = 0; j < webkit_pad.buttons_length; ++j) {
+        output_pad.buttons[j].value = webkit_pad.buttons[j];
+        output_pad.buttons[j].pressed = webkit_pad.buttons[j] >= 0.1f ?

[scottmg, 2014/02/18 23:45:26]

I think the deadzoning/threshold should happen in the data fetcher. For example,
http://msdn.microsoft.com/en-us/library/windows/desktop/ee417001(v=vs.85).asp...
specifies how it ought to be done for XInput.

[bajones, 2014/02/18 23:54:04]

Fair enough. That will require a few more #ifdef guards to make sure everything
meshes nicely but it shouldn't be too hard.

+            PP_TRUE : PP_FALSE;
+      }
     }
   }
 }
 
 }  // namespace ppapi