Update Gamepad API to match the latest specification

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);
       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));
+      for (unsigned j = 0; j < webkit_pad.axes_length; ++j)
+        output_pad.axes[j] = webkit_pad.axes[j];

[dmichael (off chromium), 2014/05/14 17:39:02]

I would expect you to get a warning for loss of precision if the left is a float
and the right is a double. You probably should static_cast<float>?

[Inactive, 2014/05/14 17:49:50]

My compiler did not complain but this is a good point. I have added the cast.

       output_pad.buttons_length = webkit_pad.buttons_length;
-
       for (unsigned j = 0; j < webkit_pad.buttons_length; ++j)
         output_pad.buttons[j] = webkit_pad.buttons[j].value;
     }
   }
 }
 
 }  // namespace ppapi