Pull gpu CmdBuf service/client shared GpuMemoryBuffer code to common

gpu/command_buffer/common/BUILD.gn

Index: gpu/command_buffer/common/BUILD.gn
diff --git a/gpu/command_buffer/common/BUILD.gn b/gpu/command_buffer/common/BUILD.gn
index 5952a94e3fe4dcfc09e2470e2b062b7eead28427..e6d604a8ce00e13b2880ad50c470b651b01769e0 100644
--- a/gpu/command_buffer/common/BUILD.gn
+++ b/gpu/command_buffer/common/BUILD.gn
@@ -62,6 +62,20 @@ source_set("common_sources") {
     ":gles2_utils",
     "//base",
   ]
+
+  # gpu_memory_buffer_support.cc includes //ui/gl/gl_bindings.h which doesn't
+  # compile on nacl.

[piman, 2016/04/04 20:49:10]

Can you replace the include by <GLES2/gl2.h> and use
//third_party/khronos:khronos_headers as a dependency?

That should compile correctly in NaCl, it's needed by other bits.

[Peng, 2016/04/04 20:54:35]

gpu_memory_buffer_support.cc needs some chromium specified GL defines which are
defined in ui/gl/gl_bindings.h, so have to depends on it.

For example: GL_RGB_YCBCR_422_CHROMIUM.

[Peng, 2016/04/06 14:28:54]

Done.

+  if (!is_nacl) {
+    sources += [
+      "gpu_memory_buffer_support.cc",
+      "gpu_memory_buffer_support.h",
+    ]
+    public_deps = [
+      "//ui/gfx",
+      "//ui/gfx/geometry",
+    ]
+    deps += [ "//ui/gl" ]
+  }
 }
 
 component("gles2_utils") {