mac: Let Carbon plugin stuff buid with the 10.7 SDK

content/plugin/plugin_carbon_interpose_mac.cc

Index: content/plugin/plugin_carbon_interpose_mac.cc
diff --git a/content/plugin/plugin_carbon_interpose_mac.cc b/content/plugin/plugin_carbon_interpose_mac.cc
index 20a7d543aee12ee364f7b2b74bdb2832d10d89cf..67190d283cc42aef9a0831dacf1dde06fd179482 100644
--- a/content/plugin/plugin_carbon_interpose_mac.cc
+++ b/content/plugin/plugin_carbon_interpose_mac.cc
@@ -12,6 +12,16 @@
 
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 
+#if defined(MAC_OS_X_VERSION_10_7)

[Mark Mentovai, 2012/07/26 22:49:00]

Since we can’t be sure there aren’t “fixed” versions of older SDKs that include
this macro, we should write:

#if defined(MAC_OS_X_VERSION_10_7) && \
    MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7

as is done elsewhere in Chrome.

Specifically, writing MAC_OS_X_VERSION_MAX_ALLOWED is the canonical “key” to
clue a reader in that this is an SDK check.

[Nico, 2012/07/26 22:53:46]

Done.

+// QuickdrawAPI.h is no longer included in the 10.7 SDK, but the symbols are
+// still exported by QD.framework (a subframework of ApplicationServices).
+// http://developer.apple.com/legacy/mac/library/documentation/Carbon/reference/QuickDraw_Ref/QuickDraw_Ref.pdf
+extern "C" {
+Boolean PtInRect(Point pt, const Rect* r);
+void SetCursor(const Cursor* crsr);
+}
+#endif  // defined(MAC_OS_X_VERSION_10_7)
+
 // Returns true if the given window is modal.
 static bool IsModalWindow(WindowRef window) {
   WindowModality modality = kWindowModalityNone;