Fix up PathProvider on the Mac for FILE_MODULE.

ui/gfx/gl/gl_implementation_mac.cc

Index: ui/gfx/gl/gl_implementation_mac.cc
diff --git a/ui/gfx/gl/gl_implementation_mac.cc b/ui/gfx/gl/gl_implementation_mac.cc
index a8b3ddd7f61c53629f7939048666e1e648828218..351bc11c2ac22f3987e03b96ab46f70a0bc584c9 100644
--- a/ui/gfx/gl/gl_implementation_mac.cc
+++ b/ui/gfx/gl/gl_implementation_mac.cc
@@ -31,6 +31,10 @@ bool InitializeGLBindings(GLImplementation implementation) {
         return false;
       }
 
+      // osmesa.so is located in:
+      // Contents/Versions/<vers>/Chromium Framework.framework/Libraries
+      module_path = module_path.DirName().Append("Libraries");
+
       // When using OSMesa, just use OSMesaGetProcAddress to find entry points.
       base::NativeLibrary library = base::LoadNativeLibrary(
           module_path.Append("osmesa.so"), NULL);