(Landing this on behalf of groby@chromium.org.  Review the CL at http://codereview.appspot.com/5482053/)

Fix issue-242 (failure to compile any shader using cos() with
SH_EMULATE_BUILT_IN_FUNCTIONS)

ANGLEBUG=242

git-svn-id: https://angleproject.googlecode.com/svn/trunk@910 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/compiler/BuiltInFunctionEmulator.cpp b/src/compiler/BuiltInFunctionEmulator.cpp
index 71c0aa7..a7950b9 100644
--- a/src/compiler/BuiltInFunctionEmulator.cpp
+++ b/src/compiler/BuiltInFunctionEmulator.cpp
@@ -333,12 +333,12 @@
     out << "// BEGIN: Generated code for built-in function emulation\n\n";
     if (withPrecision) {
         out << "#if defined(GL_FRAGMENT_PRECISION_HIGH)\n"
-            << "#define webgl_emulation_precision highp\n"
+            << "#define webgl_emu_precision highp\n"
             << "#else\n"
-            << "#define webgl_emulation_precision mediump\n"
+            << "#define webgl_emu_precision mediump\n"
             << "#endif\n\n";
     } else {
-        out << "#define webgl_emulation_precision\n\n";
+        out << "#define webgl_emu_precision\n\n";
     }
     for (size_t i = 0; i < mFunctions.size(); ++i) {
         out << mFunctionSource[mFunctions[i]] << "\n\n";