Move allocate instance id to chrome/.

content/common/browser_plugin/browser_plugin_constants.h

Index: content/common/browser_plugin/browser_plugin_constants.h
diff --git a/content/common/browser_plugin/browser_plugin_constants.h b/content/common/browser_plugin/browser_plugin_constants.h
index 973cad3b66c98bd4a1bb9865a00bc5fd5749e2b7..7c408d3c413776fead23928a36c6892f69bbd717 100644
--- a/content/common/browser_plugin/browser_plugin_constants.h
+++ b/content/common/browser_plugin/browser_plugin_constants.h
@@ -12,9 +12,6 @@ namespace browser_plugin {
 // Internal method bindings.
 extern const char kMethodInternalAttach[];
 
-// Internal events
-extern const char kEventInternalInstanceIDAllocated[];
-
 // Attributes.
 extern const char kAttributeAllowTransparency[];
 extern const char kAttributeAutoSize[];
@@ -28,12 +25,9 @@ extern const char kAttributePartition[];
 extern const char kAttributeSrc[];
 
 // Parameters/properties on events.
-extern const char kPersistPrefix[];
 extern const char kWindowID[];
 
 // Error messages.
-extern const char kErrorAlreadyNavigated[];
-extern const char kErrorInvalidPartition[];
 extern const char kErrorCannotRemovePartition[];
 
 // Other.