Remove control character cookie UMA stats.

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 3a5fb0ae3905e1b221beec102b902d359c59010c..9108ebba25ff8f405b12e4faf2cda8ce0f1f36ac 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -1380,18 +1380,6 @@ other types of suffix sets.
   </summary>
 </histogram>
 
-<histogram name="Cookie.ParsedCookieStatus" enum="ParsedCookieStatus">
-  <summary>
-    When parsing a cookie, indicates if control characters were present in any
-    of the cookie values and if any of the cookie values were invalid.
-    Specifically, checks that all of the parsed values are valid according to
-    the valid token definition in Section 2.2 of RFC2616 which specifies a token
-    must have no separators (i.e. no characters from the following string,
-    ignoring the starting and ending single quote: '()&lt;&gt;@,;:\&quot;/[]?={}
-    \t') and no control characters.
-  </summary>
-</histogram>

[Ilya Sherman, 2013/09/20 17:42:46]

Please mark the histograms as <obsolete> rather than removing them outright. 
Among other things, this helps prevent folks from accidentally re-using these
same histogram names for unrelated logging down the line.

[jww, 2013/09/20 17:56:26]

Done.

-
 <histogram name="Cookie.ReinstatedCookies" units="seconds">
   <summary>
     The duration in seconds between a cookie getting evicted (due to the number
@@ -1399,36 +1387,6 @@ other types of suffix sets.
   </summary>
 </histogram>
 
-<histogram name="Cookie.SetAttributePairCharsValidity" enum="BooleanValid">
-  <summary>
-    Indicates whether a cookie attribute pair was set with both a valid key and
-    a valid attribute value or not. For the key, this implies that it was a
-    valid token as defined in Section 2.2 of RFC2616 which specifies a token
-    must have no separators (i.e. no characters from the following string,
-    ignoring the starting and ending single quote: '()&lt;&gt;@,;:\&quot;/[]?={}
-    \t') and no control characters. For the value, this implies that it
-    contained no control characters and no semicolon.
-  </summary>
-</histogram>
-
-<histogram name="Cookie.SetNameValidity" enum="BooleanValid">
-  <summary>
-    Indicates whether a cookie name was set with a valid token. A valid token is
-    defined in Section 2.2 of RFC2616 which specifies a token must have no
-    separators (i.e. no characters from the following string, ignoring the
-    starting and ending single quote: '()&lt;&gt;@,;:\&quot;/[]?={} \t') and no
-    control characters.
-  </summary>
-</histogram>
-
-<histogram name="Cookie.SetValueCookieValueValidity" enum="BooleanValid">
-  <summary>
-    Indicates whether a cookie value was valid or invalid when there was an
-    attempt to set it, where a valid value is defined in RFC 6265 as ASCII
-    characters excluding controls, whitspace, comma, semicolon, and backslash.
-  </summary>
-</histogram>
-
 <histogram name="Cros.ClickOnShelf" enum="CrosShelfClickTarget">
   <summary>Chrome OS shelf clicks.</summary>
 </histogram>
@@ -19062,11 +19020,6 @@ other types of suffix sets.
   <int value="1" label="Used"/>
 </enum>
 
-<enum name="BooleanValid" type="int">
-  <int value="0" label="Invalid"/>
-  <int value="1" label="Valid"/>
-</enum>
-
 <enum name="BooleanWiped" type="int">
   <int value="0" label="Re-enabled"/>
   <int value="1" label="Wiped out"/>
@@ -23943,13 +23896,6 @@ other types of suffix sets.
   <int value="4" label="Index"/>
 </enum>
 
-<enum name="ParsedCookieStatus" type="int">
-  <int value="0" label="All cookie values valid and without control chars"/>
-  <int value="1" label="Cookie contains control chars"/>
-  <int value="2" label="Cookie is invalid"/>
-  <int value="3" label="Cookie contains both control chars and is invalid"/>
-</enum>
-
 <enum name="PepperVideoDecodeError" type="int">
   <int value="1" label="Illegal state">
     An operation was attempted during an incompatible decoder state.