Fix angle miscompiling shaders on x86_64 Android.

src/compiler/preprocessor/numeric_lex.h

@@ -48,6 +48,15 @@ bool numeric_lex_int(const std::string &str, IntType *value)
 template<typename FloatType>
 bool numeric_lex_float(const std::string &str, FloatType *value)
 {
+// On 64-bit Intel Android, istringstream is broken.  Until this is fixed in
+// a newer NDK, don't use it.  Android doesn't have locale support, so this
+// doesn't have to force the C locale.
+// TODO(thakis): Remove this once this bug has been fixed in the NDK and
+// that NDK has been rolled into chromium.
+#if defined(ANGLE_PLATFORM_ANDROID) && __x86_64__
+    *value = strtod(str.c_str(), nullptr);
+    return errno != ERANGE;
+#else
     std::istringstream stream(str);
     // Force "C" locale so that decimal character is always '.', and
     // not dependent on the current locale.
@@ -55,6 +64,7 @@ bool numeric_lex_float(const std::string &str, FloatType *value)
 
     stream >> (*value);
     return !stream.fail();
+#endif
 }
 
 } // namespace pp.