Fix omnibox mouse click highlight/word select/focus issue in aura build.

views/metrics_aura.cc

Index: views/metrics_aura.cc
diff --git a/views/metrics_aura.cc b/views/metrics_aura.cc
index 46fb9b938aef472e686a6fd413c199dfdbb870ef..2fc9c68635957696fea54eba16ce3e58fd459d82 100644
--- a/views/metrics_aura.cc
+++ b/views/metrics_aura.cc
@@ -14,7 +14,9 @@ int GetDoubleClickInterval() {
 #if defined(OS_WIN)
   return ::GetDoubleClickTime();
 #else
-  return 5;
+  // Use the default double click interval value on gtk.

[oshima, 2011/11/11 01:52:32]

ditto

+  // TODO(jennyz): This value may need to be adjusted on different platform.
+  return 500;
 #endif
 }