Add few LOG(ERROR)s when LoadLibrary fails

ui/gl/gl_implementation_android.cc

Index: ui/gl/gl_implementation_android.cc
diff --git a/ui/gl/gl_implementation_android.cc b/ui/gl/gl_implementation_android.cc
index 190f6692428cecc4779dcce8d9c594eacee5850f..22d5ec63a120d1158e2624604b50ae4f2d747ec6 100644
--- a/ui/gl/gl_implementation_android.cc
+++ b/ui/gl/gl_implementation_android.cc
@@ -57,10 +57,13 @@ bool InitializeStaticGLBindings(GLImplementation implementation) {
   switch (implementation) {
     case kGLImplementationEGLGLES2: {
       base::NativeLibrary gles_library = LoadLibrary("libGLESv2.so");
-      if (!gles_library)
+      if (!gles_library) {
+        LOG(ERROR) << "Failed to load libGLESv2.so.";
         return false;
+      }
       base::NativeLibrary egl_library = LoadLibrary("libEGL.so");
       if (!egl_library) {
+        LOG(ERROR) << "Failed to load libEGL.so.";
         base::UnloadNativeLibrary(gles_library);
         return false;
       }
@@ -120,6 +123,7 @@ bool InitializeDynamicGLBindings(GLImplementation implementation,
         InitializeDynamicGLBindingsGL(context);
       break;
     default:
+      NOTREACHED() << "InitializeDynamicGLBindings on Android";
       return false;
   }