testing patch for aligned reads by webp in javascript

drivers/webp/utils/bit_reader.h

@@ -37,6 +37,12 @@ extern "C" {
 // BITS can be any multiple of 8 from 8 to 56 (inclusive).
 // Pick values that fit natural register size.
 
+#ifdef JAVASCRIPT_ENABLED
+
+#define BITS 16
+
+#else
+
 #if defined(__i386__) || defined(_M_IX86)      // x86 32bit
 #define BITS 24
 #elif defined(__x86_64__) || defined(_M_X64)   // x86 64bit
@@ -49,6 +55,8 @@ extern "C" {
 #define BITS 24  // TODO(skal): test aarch64 and find the proper BITS value.
 #endif
 
+#endif
+
 //------------------------------------------------------------------------------
 // Derived types and constants:
 //   bit_t = natural register type for storing 'value_' (which is BITS+8 bits)