Fixed the switch cases fall-through and variable declarations.

webrender/res/ps_border.fs.glsl

@@ -366,17 +366,27 @@ void main(void) {
 
     vec2 brightness_mod = vec2(0.7, 1.3);
 
+    // Note: we can't pass-through in the following cases,
+    // because Angle doesn't support it and fails to compile the shaders.
     switch (vBorderStyle) {
         case BORDER_STYLE_DASHED:
+          draw_dashed_or_dotted_border(local_pos, distance_from_mix_line);
+          break;
         case BORDER_STYLE_DOTTED:
           draw_dashed_or_dotted_border(local_pos, distance_from_mix_line);
           break;
         case BORDER_STYLE_DOUBLE:
           draw_double_border(distance_from_mix_line, local_pos);
           break;
         case BORDER_STYLE_OUTSET:
+          draw_solid_border(distance_from_mix_line, local_pos);
+          break;
         case BORDER_STYLE_INSET:
+          draw_solid_border(distance_from_mix_line, local_pos);
+          break;
         case BORDER_STYLE_SOLID:
+          draw_solid_border(distance_from_mix_line, local_pos);
+          break;
         case BORDER_STYLE_NONE:
           draw_solid_border(distance_from_mix_line, local_pos);
           break;
@@ -387,6 +397,7 @@ void main(void) {
           draw_mixed_border(distance_from_mix_line, distance_from_middle, local_pos, brightness_mod.xy);
           break;
         case BORDER_STYLE_HIDDEN:
+          discard;
         default:
           discard;
     }

webrender/res/ps_gradient.vs.glsl

@@ -12,7 +12,7 @@ void main(void) {
 
     vec4 segment_rect;
     switch (int(gradient.kind.x)) {
-        case GRADIENT_HORIZONTAL:
+        case GRADIENT_HORIZONTAL: {
             float x0 = mix(gradient.start_end_point.x,
                            gradient.start_end_point.z,
                            g0.offset.x);
@@ -22,8 +22,8 @@ void main(void) {
             segment_rect.yw = prim.local_rect.yw;
             segment_rect.x = x0;
             segment_rect.z = x1 - x0;
-            break;
-        case GRADIENT_VERTICAL:
+            } break;
+        case GRADIENT_VERTICAL: {
             float y0 = mix(gradient.start_end_point.y,
                            gradient.start_end_point.w,
                            g0.offset.x);
@@ -33,7 +33,7 @@ void main(void) {
             segment_rect.xz = prim.local_rect.xz;
             segment_rect.y = y0;
             segment_rect.w = y1 - y0;
-            break;
+            } break;
     }
 
 #ifdef WR_FEATURE_TRANSFORM