Move the default definition of GR_USE_NEW_SHADER_SOURCE_SIGNATURE to GrGLConfig.

include/gpu/gl/GrGLConfig.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 
@@ skipping 82 matching lines @@
  * stencil formats as attachments. If the FBO is complete we will assume
  * subsequent attachments with the same formats are complete as well.
  *
  * GR_GL_USE_NV_PATH_RENDERING: Enable experimental support for
  * GL_NV_path_rendering. There are known issues with clipping, non-AA paths, and
  * perspective.
  *
  * GR_GL_MUST_USE_VBO: Indicates that all vertices and indices must be rendered
  * from VBOs. Chromium's command buffer doesn't allow glVertexAttribArray with
  * ARARY_BUFFER 0 bound or glDrawElements with ELEMENT_ARRAY_BUFFER 0 bound.
+ *
+ * GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE is for compatibility with the new version
+ * of the OpenGLES2.0 headers from Khronos.  glShaderSource now takes a const char * const *,
+ * instead of a const char
  */
 
 #if !defined(GR_GL_LOG_CALLS)
     #define GR_GL_LOG_CALLS                             GR_DEBUG
 #endif
 
 #if !defined(GR_GL_LOG_CALLS_START)
     #define GR_GL_LOG_CALLS_START                       0
 #endif
 
@@ skipping 34 matching lines @@
 #endif
 
 #if !defined(GR_GL_USE_NV_PATH_RENDERING)
     #define GR_GL_USE_NV_PATH_RENDERING                 0
 #endif
 
 #if !defined(GR_GL_MUST_USE_VBO)
     #define GR_GL_MUST_USE_VBO                          0
 #endif
 
+#if !defined(GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE)
+    #define GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE       0
+#endif
+
 /**
  * There is a strange bug that occurs on Macs with NVIDIA GPUs. We don't
  * fully understand it. When (element) array buffers are continually
  * respecified using glBufferData performance can fall off of a cliff. The
  * driver winds up performing many DMA mapping / unmappings and chews up ~50% of
  * the core. However, it has been observed that occaisonally respecifiying the
  * buffer using glBufferData and then writing data using glBufferSubData
  * prevents the bad behavior.
  *
  * There is a lot of uncertainty around this issue. In Chrome backgrounding
@@ skipping 10 matching lines @@
  * trick every 128 array buffer uploads.
  *
  * Hopefully we will understand this better and have a cleaner fix or get a
  * OS/driver level fix.
  */
 #define GR_GL_MAC_BUFFER_OBJECT_PERFOMANCE_WORKAROUND   \
     (GR_MAC_BUILD &&                                    \
      !GR_GL_USE_BUFFER_DATA_NULL_HINT)
 
 #endif