Adds support for the GL_ANGLE_texture_usage and GL_EXT_texture_storage

gpu/command_buffer/common/gles2_cmd_format_test_autogen.h

Index: gpu/command_buffer/common/gles2_cmd_format_test_autogen.h
===================================================================
--- gpu/command_buffer/common/gles2_cmd_format_test_autogen.h	(revision 112643)
+++ gpu/command_buffer/common/gles2_cmd_format_test_autogen.h	(working copy)
@@ -3297,6 +3297,27 @@
       next_cmd, sizeof(cmd));
 }
 
+TEST_F(GLES2FormatTest, TexStorage2DEXT) {
+  TexStorage2DEXT& cmd = *GetBufferAs<TexStorage2DEXT>();
+  void* next_cmd = cmd.Set(
+      &cmd,
+      static_cast<GLenum>(11),
+      static_cast<GLsizei>(12),
+      static_cast<GLint>(13),
+      static_cast<GLsizei>(14),
+      static_cast<GLsizei>(15));
+  EXPECT_EQ(static_cast<uint32>(TexStorage2DEXT::kCmdId),
+            cmd.header.command);
+  EXPECT_EQ(sizeof(cmd), cmd.header.size * 4u);
+  EXPECT_EQ(static_cast<GLenum>(11), cmd.target);
+  EXPECT_EQ(static_cast<GLsizei>(12), cmd.levels);
+  EXPECT_EQ(static_cast<GLint>(13), cmd.internalFormat);
+  EXPECT_EQ(static_cast<GLsizei>(14), cmd.width);
+  EXPECT_EQ(static_cast<GLsizei>(15), cmd.height);
+  CheckBytesWrittenMatchesExpectedSize(
+      next_cmd, sizeof(cmd));
+}
+
 TEST_F(GLES2FormatTest, SwapBuffers) {
   SwapBuffers& cmd = *GetBufferAs<SwapBuffers>();
   void* next_cmd = cmd.Set(