content: Remove cc hash_pair.h entry from DEPS file.

content/DEPS

 # Do NOT add chrome or components to the list below.  We shouldn't be
 # including files from src/chrome or src/components in src/content.
 include_rules = [
   # The subdirectories in content/ will manually allow their own include
   # directories in content/ so we disallow all of them.
   "-content",
   "+content/common",
   "+content/port/common",
   "+content/public/common",
   "+content/public/test",
   "+content/shell",  # for content_browsertests
   "+content/test",
 
   # content isn't tied to prefs so that other embedders are able to pick
   # different ways of storing their preferences. Also, this is to avoid prefs
   # being used as a parallel API to the Content API.
   "-base/prefs",
 
   "+cc",
   # If you want to use any of these files, move them to src/base first.
-  "-cc/base/hash_pair.h",
   "-cc/base/scoped_ptr_algorithm.h",
   "-cc/base/scoped_ptr_deque.h",
   "-cc/base/scoped_ptr_vector.h",
 
   "+crypto",
   "+grit/blink_resources.h",
   "+grit/content_resources.h",
   "+grit/ui_resources.h",
   "+grit/ui_strings.h",
   "+grit/webkit_resources.h",
@@ skipping 62 matching lines @@
   # Content shouldn't depend on views. While we technically don't need this
   # line, since the top level DEPS doesn't allow it, we add it to make this
   # explicit.
   "-ui/views",
 
   "+webkit",
 
   # For generated JNI includes.
   "+jni",
 ]