Fixed all unused-variable Clang warnings on Windows.

ppapi/proxy/video_decoder_resource_unittest.cc

 // Copyright 2014 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 <GLES2/gl2.h>
 
 #include "base/memory/shared_memory.h"
 #include "base/message_loop/message_loop.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/ppb_video_decoder.h"
@@ skipping 13 matching lines @@
 namespace ppapi {
 namespace proxy {
 
 namespace {
 
 const PP_Resource kGraphics3D = 7;
 const uint32_t kShmSize = 256;
 const size_t kDecodeBufferSize = 16;
 const uint32_t kDecodeId = 5;
 const uint32_t kTextureId1 = 1;
+#if !defined(OS_WIN) || !defined(ARCH_CPU_64_BITS)
 const uint32_t kTextureId2 = 2;
+#endif
 const uint32_t kNumRequestedTextures = 2;
 
 class MockCompletionCallback {
  public:
   MockCompletionCallback() : called_(false) {}
 
   bool called() { return called_; }
   int32_t result() { return result_; }
 
   void Reset() { called_ = false; }
@@ skipping 527 matching lines @@
   ASSERT_FALSE(uncalled_cb.called());
   ASSERT_EQ(PP_ERROR_RESOURCE_FAILED, CallFlush(decoder.get(), &uncalled_cb));
   ASSERT_FALSE(uncalled_cb.called());
   ASSERT_EQ(PP_ERROR_RESOURCE_FAILED, CallReset(decoder.get(), &uncalled_cb));
   ASSERT_FALSE(uncalled_cb.called());
 }
 #endif  // !defined(OS_WIN) || !defined(ARCH_CPU_64_BITS)
 
 }  // namespace proxy
 }  // namespace ppapi