Use "#pragma mapbox:" commands in Mapbox GL Native

Part of mapbox/mapbox-gl-native#5174.
Fixes #1.

src/circle.fragment.glsl

@@ -9,21 +9,13 @@ precision mediump float;
 uniform lowp float u_blur;
 uniform lowp float u_opacity;
 
-#ifndef MAPBOX_GL_JS
-uniform vec4 u_color;
-#else
 #pragma mapbox: define color lowp
-#endif
 varying lowp float v_antialiasblur;
 
 varying vec2 v_extrude;
 
 void main() {
-#ifndef MAPBOX_GL_JS
-    vec4 color = u_color;
-#else
     #pragma mapbox: initialize color lowp
-#endif
 
     float t = smoothstep(1.0 - max(u_blur, v_antialiasblur), 1.0, length(v_extrude));
     gl_FragColor = color * (1.0 - t) * u_opacity;

src/circle.vertex.glsl

@@ -12,21 +12,13 @@ uniform float u_devicepixelratio;
 
 attribute vec2 a_pos;
 
-#ifndef MAPBOX_GL_JS
-uniform float u_radius;
-#else
 #pragma mapbox: define radius mediump
-#endif
 
 varying vec2 v_extrude;
 varying lowp float v_antialiasblur;
 
 void main(void) {
-#ifndef MAPBOX_GL_JS
-    float radius = u_radius;
-#else
     #pragma mapbox: initialize radius mediump
-#endif
     // unencode the extrusion vector that we snuck into the a_pos vector
     v_extrude = vec2(mod(a_pos, 2.0) * 2.0 - 1.0);
 

src/fill.fragment.glsl

@@ -6,21 +6,11 @@ precision mediump float;
 #define highp
 #endif
 
-#ifdef MAPBOX_GL_JS
 #pragma mapbox: define color lowp
-#else
-uniform lowp vec4 u_color;
-#endif
-
 uniform lowp float u_opacity;
 
 void main() {
-
-#ifdef MAPBOX_GL_JS
     #pragma mapbox: initialize color lowp
-#else
-    lowp vec4 color = u_color;
-#endif
 
     gl_FragColor = color * u_opacity;
 

src/fill.vertex.glsl

@@ -10,15 +10,6 @@ attribute vec2 a_pos;
 
 uniform mat4 u_matrix;
 
-#ifdef MAPBOX_GL_JS
-#pragma mapbox: define color lowp
-#endif
-
 void main() {
-
-#ifdef MAPBOX_GL_JS
-    #pragma mapbox: initialize color lowp
-#endif
-
     gl_Position = u_matrix * vec4(a_pos, 0, 1);
 }

src/outline.fragment.glsl

@@ -6,23 +6,14 @@ precision mediump float;
 #define highp
 #endif
 
-#ifdef MAPBOX_GL_JS
 #pragma mapbox: define outline_color lowp
-#else
-uniform lowp vec4 u_color;
-#endif
 
 uniform lowp float u_opacity;
 
 varying vec2 v_pos;
 
 void main() {
-
-#ifdef MAPBOX_GL_JS
     #pragma mapbox: initialize outline_color lowp
-#else
-    lowp vec4 outline_color = u_color;
-#endif
 
     float dist = length(v_pos - gl_FragCoord.xy);
     float alpha = smoothstep(1.0, 0.0, dist);

src/outline.vertex.glsl

@@ -13,16 +13,7 @@ uniform vec2 u_world;
 
 varying vec2 v_pos;
 
-#ifdef MAPBOX_GL_JS
-#pragma mapbox: define outline_color lowp
-#endif
-
-
 void main() {
-#ifdef MAPBOX_GL_JS
-    #pragma mapbox: initialize outline_color lowp
-#endif
-
     gl_Position = u_matrix * vec4(a_pos, 0, 1);
     v_pos = (gl_Position.xy / gl_Position.w + 1.0) / 2.0 * u_world;
 }