Revert of Add nanosecond timer. (https://codereview.chromium.org/250243002/)

Reason for revert:
breaks EVERYTHING

Original issue's description:
> Add nanosecond timer.
>
> I've been finding it hard to get enough resolution out of our existing timers when measuring really tiny pictures.
>
> BUG=skia:2378
>
> Committed: http://code.google.com/p/skia/source/detail?r=14362

R=bsalomon@google.com, bungeman@google.com, mtklein@chromium.org
TBR=bsalomon@google.com, bungeman@google.com, mtklein@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=skia:2378

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/258703002

git-svn-id: http://skia.googlecode.com/svn/trunk/src@14364 2bbb7eff-a529-9590-31e7-b0007b416f81

2 files changed, 14 insertions, 34 deletions

diff --git a/ports/SkTime_Unix.cpp b/ports/SkTime_Unix.cpp
index cdf7f3d9..f519a69d 100644
--- a/ports/SkTime_Unix.cpp
+++ b/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 @@ void SkTime::GetDateTime(DateTime* dt) {
     }
 }
 
-#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
diff --git a/ports/SkTime_win.cpp b/ports/SkTime_win.cpp
index a48a69e8..37af9f29 100644
--- a/ports/SkTime_win.cpp
+++ b/ports/SkTime_win.cpp
@@ -9,7 +9,8 @@
 
 #include "SkTime.h"
 
-void SkTime::GetDateTime(DateTime* dt) {
+void SkTime::GetDateTime(DateTime* dt)
+{
     if (dt)
     {
         SYSTEMTIME      st;
@@ -25,12 +26,13 @@ void SkTime::GetDateTime(DateTime* dt) {
     }
 }
 
-SkNSec SkTime::GetNSecs() {
+SkMSec SkTime::GetMSecs()
+{
     FILETIME        ft;
     LARGE_INTEGER   li;
     GetSystemTimeAsFileTime(&ft);
     li.LowPart  = ft.dwLowDateTime;
     li.HighPart = ft.dwHighDateTime;
     __int64 t  = li.QuadPart;       /* In 100-nanosecond intervals */
-    return (SkMSec)(t * 100);
+    return (SkMSec)(t / 10000);               /* In milliseconds */
 }