get rid of android_native_buffer_t::getHandle() and replace it with an handle field

this abstraction was not necessary. things are easier now.
diff --git a/opengl/libagl/egl.cpp b/opengl/libagl/egl.cpp
index 67dfd3e..720ba0b 100644
--- a/opengl/libagl/egl.cpp
+++ b/opengl/libagl/egl.cpp
@@ -274,26 +274,14 @@
 status_t egl_window_surface_v2_t::lock(
         android_native_buffer_t* buf, int usage, void** vaddr)
 {
-    int err;
-    buffer_handle_t bufferHandle;
-    err = buf->getHandle(buf, &bufferHandle);
-    if (err < 0)
-        return err;
-
-    err = module->lock(module, bufferHandle, 
+    int err = module->lock(module, buf->handle, 
             usage, 0, 0, buf->width, buf->height, vaddr);
     return err;
 }
 
 status_t egl_window_surface_v2_t::unlock(android_native_buffer_t* buf)
 {
-    int err;
-    buffer_handle_t bufferHandle;
-    err = buf->getHandle(buf, &bufferHandle);
-    if (err < 0)
-        return err;
-
-    err = module->unlock(module, bufferHandle);
+    int err = module->unlock(module, buf->handle);
     return err;
 }
 
@@ -379,8 +367,7 @@
 #ifdef LIBAGL_USE_GRALLOC_COPYBITS
     gl->copybits.drawSurfaceFd = -1;
     if (supportedCopybitsDestinationFormat(buffer.format)) {
-        buffer_handle_t handle;
-        this->buffer->getHandle(this->buffer, &handle);
+        buffer_handle_t handle = this->buffer->handle;
         if (handle != NULL) {
             private_handle_t* hand = private_handle_t::dynamicCast(handle);
             if (hand != NULL) {
diff --git a/opengl/libagl/texture.cpp b/opengl/libagl/texture.cpp
index 9bcbfdd..1189643 100644
--- a/opengl/libagl/texture.cpp
+++ b/opengl/libagl/texture.cpp
@@ -139,10 +139,9 @@
 
                 gralloc_module_t const* module =
                     reinterpret_cast<gralloc_module_t const*>(pModule);
-                buffer_handle_t bufferHandle;
-                native_buffer->getHandle(native_buffer, &bufferHandle);
+
                 void* vaddr;
-                int err = module->lock(module, bufferHandle,
+                int err = module->lock(module, native_buffer->handle,
                         GRALLOC_USAGE_SW_READ_OFTEN,
                         0, 0, native_buffer->width, native_buffer->height,
                         &vaddr);
@@ -168,9 +167,8 @@
 
                 gralloc_module_t const* module =
                     reinterpret_cast<gralloc_module_t const*>(pModule);
-                buffer_handle_t bufferHandle;
-                native_buffer->getHandle(native_buffer, &bufferHandle);
-                module->unlock(module, bufferHandle);
+
+                module->unlock(module, native_buffer->handle);
                 u.texture->setImageBits(NULL);
                 c->rasterizer.procs.bindTexture(c, &(u.texture->surface));
             }
@@ -1547,13 +1545,10 @@
      */
 #ifdef LIBAGL_USE_GRALLOC_COPYBITS
     tex->copybits_fd = -1;
-    buffer_handle_t handle;
-    if (native_buffer->getHandle(native_buffer, &handle) == 0) {
-        private_handle_t* hand;
-        if ((hand = private_handle_t::dynamicCast(handle)) != NULL) {
-            if (hand->usesPhysicallyContiguousMemory()) {
-                tex->copybits_fd = hand->fd;
-            }
+    private_handle_t* hand;
+    if ((hand = private_handle_t::dynamicCast(native_buffer->handle)) != NULL) {
+        if (hand->usesPhysicallyContiguousMemory()) {
+            tex->copybits_fd = hand->fd;
         }
     }
 #endif // LIBAGL_USE_GRALLOC_COPYBITS