Commented out precision from shaders. These examples were done on my new desk...

third_party/gles2_book/Chapter_9/Simple_Texture2D/Simple_Texture2D.c

 //
 // Book:      OpenGL(R) ES 2.0 Programming Guide
 // Authors:   Aaftab Munshi, Dan Ginsburg, Dave Shreiner
 // ISBN-10:   0321502795
 // ISBN-13:   9780321502797
 // Publisher: Addison-Wesley Professional
 // URLs:      http://safari.informit.com/9780321563835
 //            http://www.opengles-book.com
 //
 
@@ skipping 53 matching lines @@
    GLbyte vShaderStr[] =  
       "attribute vec4 a_position;   \n"
       "attribute vec2 a_texCoord;   \n"
       "varying vec2 v_texCoord;     \n"
       "void main()                  \n"
       "{                            \n"
       "   gl_Position = a_position; \n"
       "   v_texCoord = a_texCoord;  \n"
       "}                            \n";
    
+   // TODO(alokp): Shaders containing "precision" do not compile.
    GLbyte fShaderStr[] =  
-      "precision mediump float;                            \n"
+      "//precision mediump float;                            \n"
       "varying vec2 v_texCoord;                            \n"
       "uniform sampler2D s_texture;                        \n"
       "void main()                                         \n"
       "{                                                   \n"
       "  gl_FragColor = texture2D( s_texture, v_texCoord );\n"
       "}                                                   \n";
 
    GLfloat vVertices[] = { -0.5f,  0.5f, 0.0f,  // Position 0
                             0.0f,  0.0f,        // TexCoord 0 
                            -0.5f, -0.5f, 0.0f,  // Position 1
@@ skipping 81 matching lines @@
 
    // Delete texture object
    glDeleteTextures ( 1, &userData->textureId );
 
    // Delete VBOs
    glDeleteBuffers ( 2, userData->vboIds );
 
    // Delete program object
    glDeleteProgram ( userData->programObject );
 }