Move shader precision modifier check onto GLSLCaps

src/gpu/gl/GrGLCaps.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGLCaps.h"
 
@@ skipping 74 matching lines @@
             glslCaps->fFBFetchColorName = "gl_LastFragData[0]";
             glslCaps->fFBFetchExtensionString = "GL_NV_shader_framebuffer_fetch";
         }
         else if (ctxInfo.hasExtension("GL_ARM_shader_framebuffer_fetch")) {
             // The arm extension also requires an additional flag which we will set onResetContext
             glslCaps->fFBFetchNeedsCustomOutput = false;
             glslCaps->fFBFetchSupport = true;
             glslCaps->fFBFetchColorName = "gl_LastFragColorARM";
             glslCaps->fFBFetchExtensionString = "GL_ARM_shader_framebuffer_fetch";
         }
+        glslCaps->fUsesPrecisionModifiers = true;
     }
 
     glslCaps->fBindlessTextureSupport = ctxInfo.hasExtension("GL_NV_bindless_texture");
 
     // Adreno GPUs have a tendency to drop tiles when there is a divide-by-zero in a shader
     glslCaps->fDropsTileOnZeroDivide = kQualcomm_GrGLVendor == ctxInfo.vendor();
 
     /**************************************************************************
      * Caps specific to GrGLCaps
      **************************************************************************/
@@ skipping 1094 matching lines @@
         for (int p = 0; p < kGrSLPrecisionCount; ++p) {
             glslCaps->fFloatPrecisions[kGeometry_GrShaderType][p] = 
                                                glslCaps->fFloatPrecisions[kVertex_GrShaderType][p];
         }
     }
 }