Add compile time checks against longs being used in IPC structs on 32 bit Android.

extensions/common/stack_frame.h

Index: extensions/common/stack_frame.h
diff --git a/extensions/common/stack_frame.h b/extensions/common/stack_frame.h
index 671f564a7c270a48f69a1f7519dff0c294600a01..b174ffc71ea47240321e4900b694adac774f0ec6 100644
--- a/extensions/common/stack_frame.h
+++ b/extensions/common/stack_frame.h
@@ -17,8 +17,8 @@ namespace extensions {
 struct StackFrame {
   StackFrame();
   StackFrame(const StackFrame& frame);
-  StackFrame(size_t line_number,
-             size_t column_number,
+  StackFrame(uint32_t line_number,
+             uint32_t column_number,
              const base::string16& source,
              const base::string16& function);
   ~StackFrame();
@@ -29,8 +29,8 @@ struct StackFrame {
 
   bool operator==(const StackFrame& rhs) const;
 
-  size_t line_number;
-  size_t column_number;
+  uint32_t line_number;
+  uint32_t column_number;
   base::string16 source;
   base::string16 function;  // optional
 };