Add support for glMapBufferRange. Use glMapBufferRange and glMapBufferSubData.

src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp

Index: src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp
diff --git a/src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp b/src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp
index b50063fb1a5911583425bd0363ef08bd1217561c..312299adaea599d20ef512e29c7bc3b32e0b5238 100644
--- a/src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp
+++ b/src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp
@@ -75,7 +75,7 @@ static GrGLInterface* create_es_interface(GrGLVersion version,
     functions->fGetShaderInfoLog = glGetShaderInfoLog;
     functions->fGetShaderiv = glGetShaderiv;
     functions->fGetString = glGetString;
-#if GL_ES_VERSION_30
+#if GL_ES_VERSION_3_0
     functions->fGetStringi = glGetStringi;
 #else
     functions->fGetStringi = (GrGLGetStringiProc) eglGetProcAddress("glGetStringi");
@@ -183,12 +183,24 @@ static GrGLInterface* create_es_interface(GrGLVersion version,
     functions->fGetFramebufferAttachmentParameteriv = glGetFramebufferAttachmentParameteriv;
     functions->fGetRenderbufferParameteriv = glGetRenderbufferParameteriv;
     functions->fRenderbufferStorage = glRenderbufferStorage;
+
 #if GL_OES_mapbuffer
     functions->fMapBuffer = glMapBufferOES;
     functions->fUnmapBuffer = glUnmapBufferOES;
 #else
     functions->fMapBuffer = (GrGLMapBufferProc) eglGetProcAddress("glMapBufferOES");
     functions->fUnmapBuffer = (GrGLUnmapBufferProc) eglGetProcAddress("glUnmapBufferOES");
+
+#endif
+
+#if GL_ES_VERSION_3_0 || GL_EXT_map_buffer_range
+    functions->fMapBufferRange = glMapBufferRange;
+    functions->fFlushMappedBufferRange = glFlushMappedBufferRange;
+#else
+    if (version >= GR_GL_VER(3,0) || extensions->has("GL_EXT_map_buffer_range")) {
+        functions->fMapBufferRange = (GrGLMapBufferRangeProc) eglGetProcAddress("glMapBufferRange");
+        functions->fFlushMappedBufferRange = (GrGLFlushMappedBufferRangeProc) eglGetProcAddress("glFlushMappedBufferRange");
+    }
 #endif
 
     if (extensions->has("GL_EXT_debug_marker")) {