Update khronos GLES2/gl2.h header

gpu/command_buffer/cmd_buffer_functions.txt

Index: gpu/command_buffer/cmd_buffer_functions.txt
diff --git a/gpu/command_buffer/cmd_buffer_functions.txt b/gpu/command_buffer/cmd_buffer_functions.txt
index 2ad875a4aeaf86566c5f0334090f6583468c4781..08d33d963e3450d6fe442b333fb88089b184d86b 100644
--- a/gpu/command_buffer/cmd_buffer_functions.txt
+++ b/gpu/command_buffer/cmd_buffer_functions.txt
@@ -103,7 +103,7 @@ GL_APICALL void         GL_APIENTRY glRenderbufferStorage (GLenumRenderBufferTar
 GL_APICALL void         GL_APIENTRY glSampleCoverage (GLclampf value, GLboolean invert);
 GL_APICALL void         GL_APIENTRY glScissor (GLint x, GLint y, GLsizei width, GLsizei height);
 GL_APICALL void         GL_APIENTRY glShaderBinary (GLsizeiNotNegative n, const GLuint* shaders, GLenumShaderBinaryFormat binaryformat, const void* binary, GLsizeiNotNegative length);
-GL_APICALL void         GL_APIENTRY glShaderSource (GLidShader shader, GLsizeiNotNegative count, const char** str, const GLint* length);
+GL_APICALL void         GL_APIENTRY glShaderSource (GLidShader shader, GLsizeiNotNegative count, const GLchar* const* str, const GLint* length);
 GL_APICALL void         GL_APIENTRY glStencilFunc (GLenumCmpFunction func, GLint ref, GLuint mask);
 GL_APICALL void         GL_APIENTRY glStencilFuncSeparate (GLenumFaceType face, GLenumCmpFunction func, GLint ref, GLuint mask);
 GL_APICALL void         GL_APIENTRY glStencilMask (GLuint mask);