Add missing (and remove superfluous) 'explicit' from constructors.

content/common/inter_process_time_ticks_converter.h

Index: content/common/inter_process_time_ticks_converter.h
diff --git a/content/common/inter_process_time_ticks_converter.h b/content/common/inter_process_time_ticks_converter.h
index 49a7c70b16f9405b16c42d7758bcf334b110686d..d7f166fc29c05b0e3bc5ea86ac2c3edb39a83f4e 100644
--- a/content/common/inter_process_time_ticks_converter.h
+++ b/content/common/inter_process_time_ticks_converter.h
@@ -80,7 +80,7 @@ class CONTENT_EXPORT LocalTimeDelta {
   friend class InterProcessTimeTicksConverter;
   friend class LocalTimeTicks;
 
-  LocalTimeDelta(int value) : value_(value) {}
+  explicit LocalTimeDelta(int value) : value_(value) {}
 
   int value_;
 };
@@ -102,7 +102,7 @@ class CONTENT_EXPORT LocalTimeTicks {
  private:
   friend class InterProcessTimeTicksConverter;
 
-  LocalTimeTicks(int64 value) : value_(value) {}
+  explicit LocalTimeTicks(int64 value) : value_(value) {}
 
   int64 value_;
 };
@@ -117,7 +117,7 @@ class CONTENT_EXPORT RemoteTimeDelta {
   friend class InterProcessTimeTicksConverter;
   friend class RemoteTimeTicks;
 
-  RemoteTimeDelta(int value) : value_(value) {}
+  explicit RemoteTimeDelta(int value) : value_(value) {}
 
   int value_;
 };
@@ -135,7 +135,7 @@ class CONTENT_EXPORT RemoteTimeTicks {
  private:
   friend class InterProcessTimeTicksConverter;
 
-  RemoteTimeTicks(int64 value) : value_(value) {}
+  explicit RemoteTimeTicks(int64 value) : value_(value) {}
 
   int64 value_;
 };