Removed unused variables and the need to include the d3dx9.h file.

BUG=webrtc:3667

Review URL: https://codereview.webrtc.org/1232713002

Cr-Commit-Position: refs/heads/master@{#9576}
diff --git a/AUTHORS b/AUTHORS
index 069c332..3452464 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -32,6 +32,7 @@
 Victor Costan <costan@gmail.com>
 
 ARM Holdings
+BroadSoft Inc.
 Google Inc.
 Intel Corporation
 MIPS Technologies
diff --git a/webrtc/modules/video_render/windows/video_render_direct3d9.cc b/webrtc/modules/video_render/windows/video_render_direct3d9.cc
index ae37110..dab4e7a 100644
--- a/webrtc/modules/video_render/windows/video_render_direct3d9.cc
+++ b/webrtc/modules/video_render/windows/video_render_direct3d9.cc
@@ -602,9 +602,6 @@
         _pd3dDevice->SetStreamSource(0, _pVB, 0, sizeof(CUSTOMVERTEX));
         _pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
 
-        D3DXMATRIX matWorld;
-        D3DXMATRIX matWorldTemp;
-
         //draw all the channels
         //get texture from the channels
         LPDIRECT3DTEXTURE9 textureFromChannel = NULL;
diff --git a/webrtc/modules/video_render/windows/video_render_direct3d9.h b/webrtc/modules/video_render/windows/video_render_direct3d9.h
index 5a2f1f9..15379b8 100644
--- a/webrtc/modules/video_render/windows/video_render_direct3d9.h
+++ b/webrtc/modules/video_render/windows/video_render_direct3d9.h
@@ -14,7 +14,6 @@
 #include "webrtc/modules/video_render/windows/i_video_render_win.h"
 
 #include <d3d9.h>
-#include <d3dx9.h>
 #include <ddraw.h>
 
 #include <Map>