Fix glDraw*Indirect prototypes

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2050403002

Review-Url: https://codereview.chromium.org/2050403002
diff --git a/include/gpu/gl/GrGLFunctions.h b/include/gpu/gl/GrGLFunctions.h
index 9287195..7822eac 100644
--- a/include/gpu/gl/GrGLFunctions.h
+++ b/include/gpu/gl/GrGLFunctions.h
@@ -60,12 +60,12 @@
 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDisableVertexAttribArrayProc)(GrGLuint index);
 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawArraysProc)(GrGLenum mode, GrGLint first, GrGLsizei count);
 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawArraysInstancedProc)(GrGLenum mode, GrGLint first, GrGLsizei count, GrGLsizei primcount);
-typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawArraysIndirectProc)(GrGLenum mode, GrGLvoid* indirect);
+typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawArraysIndirectProc)(GrGLenum mode, const GrGLvoid* indirect);
 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawBufferProc)(GrGLenum mode);
 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawBuffersProc)(GrGLsizei n, const GrGLenum* bufs);
 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawElementsProc)(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid* indices);
 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawElementsInstancedProc)(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid *indices, GrGLsizei primcount);
-typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawElementsIndirectProc)(GrGLenum mode, GrGLenum type, GrGLvoid* indirect);
+typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawElementsIndirectProc)(GrGLenum mode, GrGLenum type, const GrGLvoid* indirect);
 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLEnableProc)(GrGLenum cap);
 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLEnableVertexAttribArrayProc)(GrGLuint index);
 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLEndQueryProc)(GrGLenum target);
diff --git a/src/gpu/gl/GrGLTestInterface.h b/src/gpu/gl/GrGLTestInterface.h
index 936d9b8..8f8a8bc 100644
--- a/src/gpu/gl/GrGLTestInterface.h
+++ b/src/gpu/gl/GrGLTestInterface.h
@@ -60,12 +60,12 @@
     virtual GrGLvoid disableVertexAttribArray(GrGLuint index) {}
     virtual GrGLvoid drawArrays(GrGLenum mode, GrGLint first, GrGLsizei count) {}
     virtual GrGLvoid drawArraysInstanced(GrGLenum mode, GrGLint first, GrGLsizei count, GrGLsizei primcount) {}
-    virtual GrGLvoid drawArraysIndirect(GrGLenum mode, GrGLvoid* indirect) {}
+    virtual GrGLvoid drawArraysIndirect(GrGLenum mode, const GrGLvoid* indirect) {}
     virtual GrGLvoid drawBuffer(GrGLenum mode) {}
     virtual GrGLvoid drawBuffers(GrGLsizei n, const GrGLenum* bufs) {}
     virtual GrGLvoid drawElements(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid* indices) {}
     virtual GrGLvoid drawElementsInstanced(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid *indices, GrGLsizei primcount) {}
-    virtual GrGLvoid drawElementsIndirect(GrGLenum mode, GrGLenum type, GrGLvoid* indirect) {}
+    virtual GrGLvoid drawElementsIndirect(GrGLenum mode, GrGLenum type, const GrGLvoid* indirect) {}
     virtual GrGLvoid enable(GrGLenum cap) {}
     virtual GrGLvoid enableVertexAttribArray(GrGLuint index) {}
     virtual GrGLvoid endQuery(GrGLenum target) {}