Add an eviction mechanism for SDCH dictionaries.

net/base/sdch_problem_code_list.h

Index: net/base/sdch_problem_code_list.h
diff --git a/net/base/sdch_problem_code_list.h b/net/base/sdch_problem_code_list.h
index 0eef912e355b1fd4a0cf78b0445622ee56955083..1fe58fdb3418d6e65a49de290cbfd3045aafd77f 100644
--- a/net/base/sdch_problem_code_list.h
+++ b/net/base/sdch_problem_code_list.h
@@ -51,8 +51,8 @@ SDCH_PROBLEM_CODE(DICTIONARY_LOAD_ATTEMPT_FROM_DIFFERENT_HOST, 30)
 SDCH_PROBLEM_CODE(DICTIONARY_SELECTED_FOR_SSL, 31)
 SDCH_PROBLEM_CODE(DICTIONARY_ALREADY_LOADED, 32)
 SDCH_PROBLEM_CODE(DICTIONARY_SELECTED_FROM_NON_HTTP, 33)
-SDCH_PROBLEM_CODE(DICTIONARY_IS_TOO_LARGE, 34)
-SDCH_PROBLEM_CODE(DICTIONARY_COUNT_EXCEEDED, 35)
+// defunct = 34, // Now recorded in separate histogram; see sdch_owner.cc.
+// defunct = 35, // Now recorded in separate histogram; see sdch_owner.cc.
 // defunct = 36, // DICTIONARY_PREVIOUSLY_SCHEDULED_TO_DOWNLOAD used instead.
 // defunct = 37, // DICTIONARY_PREVIOUSLY_SCHEDULED_TO_DOWNLOAD used instead.
 // defunct = 38, // No longer paying attention to URLRequest::Read return.
@@ -61,6 +61,9 @@ SDCH_PROBLEM_CODE(DICTIONARY_PREVIOUSLY_SCHEDULED_TO_DOWNLOAD, 39)
 // Failsafe hack.
 SDCH_PROBLEM_CODE(ATTEMPT_TO_DECODE_NON_HTTP_DATA, 40)
 
+// More dictionary loading problems.
+SDCH_PROBLEM_CODE(DICTIONARY_NO_ROOM, 44)
+
 // Content-Encoding problems detected, with no action taken.
 SDCH_PROBLEM_CODE(MULTIENCODING_FOR_NON_SDCH_REQUEST, 50)
 SDCH_PROBLEM_CODE(SDCH_CONTENT_ENCODE_FOR_NON_SDCH_REQUEST, 51)