Use GLVersionInfo instead of gl::GetGLImplementation() to decide GL paths

gpu/command_buffer/service/gles2_cmd_decoder_unittest_programs.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/command_line.h"
@@ skipping 589 matching lines @@
            Result::ComputeSize(1));
   EXPECT_CALL(*gl_, GetAttachedShaders(_, _, _, _)).Times(0);
   EXPECT_NE(error::kNoError, ExecuteCmd(cmd));
   cmd.Init(client_program_id_,
            shared_memory_id_,
            kInvalidSharedMemoryOffset,
            Result::ComputeSize(1));
   EXPECT_NE(error::kNoError, ExecuteCmd(cmd));
 }
 
-TEST_P(GLES2DecoderWithShaderTest, GetShaderPrecisionFormatSucceeds) {
-  ScopedGLImplementationSetter gl_impl(::gl::kGLImplementationEGLGLES2);
+TEST_P(GLES2DecoderManualInitTest, GetShaderPrecisionFormatSucceeds) {
+  // Force ES underlying implementation to ensure we check the shader precision
+  // format.
+  InitState init;
+  init.gl_version = "opengl es 2.0";
+  init.bind_generates_resource = true;
+  InitDecoder(init);
+
   GetShaderPrecisionFormat cmd;
   typedef GetShaderPrecisionFormat::Result Result;
   Result* result = static_cast<Result*>(shared_memory_address_);
   result->success = 0;
   const GLint range[2] = {62, 62};
   const GLint precision = 16;
   EXPECT_CALL(*gl_, GetShaderPrecisionFormat(_, _, _, _))
       .WillOnce(DoAll(SetArrayArgument<2>(range, range + 2),
                       SetArgPointee<3>(precision)))
       .RetiresOnSaturation();
@@ skipping 1719 matching lines @@
 }
 
 // TODO(gman): DeleteProgram
 
 // TODO(gman): UseProgram
 
 // TODO(gman): DeleteShader
 
 }  // namespace gles2
 }  // namespace gpu