Revert of Initial version of external_oes texture support and unit test

src/gpu/gl/GrGLGpu.h

Index: src/gpu/gl/GrGLGpu.h
diff --git a/src/gpu/gl/GrGLGpu.h b/src/gpu/gl/GrGLGpu.h
index 637a1cf16157af0a0b95f7802f181e6525b179fc..c8da150a0da6c1d56636a455255a1196ea3627df 100644
--- a/src/gpu/gl/GrGLGpu.h
+++ b/src/gpu/gl/GrGLGpu.h
@@ -322,7 +322,7 @@
 
     SkAutoTUnref<GrGLContext>  fGLContext;
 
-    void createCopyPrograms();
+    void createCopyProgram();
 
     // GL program-related state
     ProgramCache*               fProgramCache;
@@ -497,17 +497,8 @@
         GrGLint     fTextureUniform;
         GrGLint     fTexCoordXformUniform;
         GrGLint     fPosXformUniform;
-    }                           fCopyPrograms[2];
-    GrGLuint                    fCopyProgramArrayBuffer;
-
-    static int TextureTargetToCopyProgramIdx(GrGLenum target) {
-        if (target == GR_GL_TEXTURE_2D) {
-            return 0;
-        } else {
-            SkASSERT(target == GR_GL_TEXTURE_EXTERNAL);
-            return 1;
-        }
-    }
+        GrGLuint    fArrayBuffer;
+    } fCopyProgram;
 
     TriState fMSAAEnabled;