Make NativePixmap unittests use TEXTURE_EXTERNAL_OES.

ui/gl/test/gl_image_test_template.h

Index: ui/gl/test/gl_image_test_template.h
diff --git a/ui/gl/test/gl_image_test_template.h b/ui/gl/test/gl_image_test_template.h
index 175ac345679bedc0a4039572d1be3fd4c1f193f0..7203f0f63e72507ccb2d67b31f61e7b505b85249 100644
--- a/ui/gl/test/gl_image_test_template.h
+++ b/ui/gl/test/gl_image_test_template.h
@@ -67,8 +67,8 @@ GLuint LoadFragmentShader(unsigned target, const gfx::Size& size) {
     case GL_TEXTURE_RECTANGLE_ARB:
       return GLHelper::LoadShader(
           GL_FRAGMENT_SHADER,
-          base::StringPrintf("%s\n"
-                             "#extension GL_ARB_texture_rectangle : require\n"
+          base::StringPrintf("#extension GL_ARB_texture_rectangle : require\n"
+                             "%s\n"
                              "#define SamplerType sampler2DRect\n"
                              "#define TextureLookup texture2DRect\n"
                              "#define TextureScale vec2(%f, %f)\n"
@@ -78,6 +78,18 @@ GLuint LoadFragmentShader(unsigned target, const gfx::Size& size) {
                              static_cast<double>(size.height()),
                              kFragmentShader)
               .c_str());
+    case GL_TEXTURE_EXTERNAL_OES:
+      return GLHelper::LoadShader(
+          GL_FRAGMENT_SHADER,
+          base::StringPrintf("#extension GL_OES_EGL_image_external : require\n"
+                             "%s\n"
+                             "#define SamplerType samplerExternalOES\n"
+                             "#define TextureLookup texture2D\n"
+                             "#define TextureScale vec2(1.0, 1.0)\n"
+                             "%s",
+                             is_gles ? kShaderFloatPrecision : "",
+                             kFragmentShader)
+              .c_str());
     default:
       NOTREACHED();
       return 0;