skia: add ability to load command_buffer_gles2

src/gpu/GrContextFactory.cpp

Index: src/gpu/GrContextFactory.cpp
diff --git a/src/gpu/GrContextFactory.cpp b/src/gpu/GrContextFactory.cpp
index d84e589f843be3218988c9a8b90cd7c45d310408..0fe01df16b41963f45f7602b18eb0e706e3ac1ec 100755
--- a/src/gpu/GrContextFactory.cpp
+++ b/src/gpu/GrContextFactory.cpp
@@ -11,6 +11,9 @@
 #if SK_ANGLE
     #include "gl/angle/SkANGLEGLContext.h"
 #endif
+#if SK_COMMAND_BUFFER
+    #include "gl/command_buffer/SkCommandBufferGLContext.h"
+#endif
 #include "gl/debug/SkDebugGLContext.h"
 #if SK_MESA
     #include "gl/mesa/SkMesaGLContext.h"
@@ -43,6 +46,11 @@ GrContext* GrContextFactory::get(GLContextType type, GrGLStandard forcedGpuAPI)
             glCtx.reset(SkANGLEGLContext::Create(forcedGpuAPI));
             break;
 #endif
+#ifdef SK_COMMAND_BUFFER
+        case kCommandBuffer_GLContextType:
+            glCtx.reset(SkCommandBufferGLContext::Create(forcedGpuAPI));
+            break;
+#endif
 #ifdef SK_MESA
         case kMESA_GLContextType:
             glCtx.reset(SkMesaGLContext::Create(forcedGpuAPI));