Switch to standard integer types in gpu/.

gpu/command_buffer/common/cmd_buffer_common.cc

Index: gpu/command_buffer/common/cmd_buffer_common.cc
diff --git a/gpu/command_buffer/common/cmd_buffer_common.cc b/gpu/command_buffer/common/cmd_buffer_common.cc
index f337e86dbf735548b0fab88033a43383d4c7f15a..c9f4b164eeec9df8dee745525c4db976963ed7e1 100644
--- a/gpu/command_buffer/common/cmd_buffer_common.cc
+++ b/gpu/command_buffer/common/cmd_buffer_common.cc
@@ -7,12 +7,14 @@
 
 #include "gpu/command_buffer/common/cmd_buffer_common.h"
 
+#include <stdint.h>
+
 #include "gpu/command_buffer/common/command_buffer.h"
 
 namespace gpu {
 #if !defined(_WIN32)
 // gcc needs this to link, but MSVC requires it not be present
-const int32 CommandHeader::kMaxSize;
+const int32_t CommandHeader::kMaxSize;
 #endif
 namespace cmd {