Blink Platform: Remove time functions from Platform.

third_party/WebKit/public/platform/Platform.h

Index: third_party/WebKit/public/platform/Platform.h
diff --git a/third_party/WebKit/public/platform/Platform.h b/third_party/WebKit/public/platform/Platform.h
index 95cfc0285be6be9238c50dba05bbd7d8322650a1..148d550f842a62160b0e13dd073b27ad639c4182 100644
--- a/third_party/WebKit/public/platform/Platform.h
+++ b/third_party/WebKit/public/platform/Platform.h
@@ -418,18 +418,6 @@ public:
     // Returns a value such as "en-US".
     virtual WebString defaultLocale() { return WebString(); }
 
-    // Wall clock time in seconds since the epoch.
-    virtual double currentTimeSeconds() { return 0; }
-
-    // Monotonically increasing time in seconds from an arbitrary fixed point in the past.
-    // This function is expected to return at least millisecond-precision values. For this reason,
-    // it is recommended that the fixed point be no further in the past than the epoch.
-    virtual double monotonicallyIncreasingTimeSeconds() { return 0; }
-
-    // System trace time in seconds. For example, on Chrome OS, this timestamp should be
-    // synchronized with ftrace timestamps.
-    virtual double systemTraceTime() { return 0; }
-
     // WebKit clients must implement this funcion if they use cryptographic randomness.
     virtual void cryptographicallyRandomValues(unsigned char* buffer, size_t length) = 0;