Simplify ppapi Graphics3D size propagation a bit

content/renderer/pepper/ppb_graphics_3d_impl.cc

Index: content/renderer/pepper/ppb_graphics_3d_impl.cc
diff --git a/content/renderer/pepper/ppb_graphics_3d_impl.cc b/content/renderer/pepper/ppb_graphics_3d_impl.cc
index 816c3a3ffb63f5277f03065a410a1bfc68253357..8545095efc5a7003c311e8aff5c03bffb002bd06 100644
--- a/content/renderer/pepper/ppb_graphics_3d_impl.cc
+++ b/content/renderer/pepper/ppb_graphics_3d_impl.cc
@@ -168,8 +168,7 @@ gpu::GpuControl* PPB_Graphics3D_Impl::GetGpuControl() {
 }
 
 int32_t PPB_Graphics3D_Impl::DoSwapBuffers(const gpu::SyncToken& sync_token,
-                                           int32_t width,
-                                           int32_t height) {
+                                           const gfx::Size& size) {
   DCHECK(command_buffer_);
   if (taken_front_buffer_.IsZero()) {
     DLOG(ERROR) << "TakeFrontBuffer should be called before DoSwapBuffers";
@@ -184,16 +183,11 @@ int32_t PPB_Graphics3D_Impl::DoSwapBuffers(const gpu::SyncToken& sync_token,
     //
     // Don't need to check for NULL from GetPluginInstance since when we're
     // bound, we know our instance is valid.
-    if (width < 0 || height < 0) {
-      width = original_width_;
-      height = original_height_;
-    }
     bool is_overlay_candidate = use_image_chromium_;
     GLenum target =
         is_overlay_candidate ? GL_TEXTURE_RECTANGLE_ARB : GL_TEXTURE_2D;
     cc::TextureMailbox texture_mailbox(taken_front_buffer_, sync_token, target,
-                                       gfx::Size(width, height),
-                                       is_overlay_candidate, false);
+                                       size, is_overlay_candidate, false);
     taken_front_buffer_.SetZero();
     HostGlobals::Get()
         ->GetInstance(pp_instance())
@@ -261,8 +255,6 @@ bool PPB_Graphics3D_Impl::InitRaw(
       std::move(channel), gpu::kNullSurfaceHandle, share_buffer,
       gpu::GPU_STREAM_DEFAULT, gpu::GpuStreamPriority::NORMAL, attrib_helper,
       GURL::EmptyGURL(), base::ThreadTaskRunnerHandle::Get());
-  original_width_ = attrib_helper.offscreen_framebuffer_size.width();
-  original_height_ = attrib_helper.offscreen_framebuffer_size.height();
   if (!command_buffer_)
     return false;