Revert of Add nanosecond timer.

src/ports/SkTime_Unix.cpp

Index: src/ports/SkTime_Unix.cpp
diff --git a/src/ports/SkTime_Unix.cpp b/src/ports/SkTime_Unix.cpp
index cdf7f3d947c94c8d042a1b553ed8857eaf5acb58..f519a69d07c2843a60427ea385a5d79b11dd765c 100644
--- a/src/ports/SkTime_Unix.cpp
+++ b/src/ports/SkTime_Unix.cpp
@@ -12,8 +12,10 @@
 #include <sys/time.h>
 #include <time.h>
 
-void SkTime::GetDateTime(DateTime* dt) {
-    if (dt) {
+void SkTime::GetDateTime(DateTime* dt)
+{
+    if (dt)
+    {
         time_t m_time;
         time(&m_time);
         struct tm* tstruct;
@@ -29,33 +31,9 @@
     }
 }
 
-#ifdef __MACH__
-#  include <mach/mach_time.h>
-
-namespace {
-
-struct ConversionFactor {
-    ConversionFactor() {
-        mach_timebase_info_data_t timebase;
-        mach_timebase_info(&timebase);
-        toNanos = (double) timebase.numer / timebase.denom;
-    }
-    double toNanos;
-};
-
-}  // namespace
-
-SkNSec SkTime::GetNSecs() {
-    static ConversionFactor convert;  // Since already know we're on Mac, this is threadsafe.
-    return mach_absolute_time() * convert.toNanos;
+SkMSec SkTime::GetMSecs()
+{
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+    return (SkMSec) (tv.tv_sec * 1000 + tv.tv_usec / 1000 ); // microseconds to milliseconds
 }
-
-#else  // Linux, presumably all others too
-
-SkNSec SkTime::GetNSecs() {
-    struct timespec time;
-    clock_gettime(CLOCK_MONOTONIC, &time);
-    return (SkNSec)(time.tv_sec * 1000000000 + time.tv_nsec);
-}
-
-#endif