Allow Chromium Linux to be built with Breakpad. Enable Linux CHROME_HEADLESS ...

chrome/app/breakpad_linux.h

Index: chrome/app/breakpad_linux.h
===================================================================
--- chrome/app/breakpad_linux.h	(revision 24255)
+++ chrome/app/breakpad_linux.h	(working copy)
@@ -9,7 +9,7 @@
 
 extern void InitCrashReporter();
 
-#if defined(GOOGLE_CHROME_BUILD)
+#if defined(USE_LINUX_BREAKPAD)
 static const size_t kMaxActiveURLSize = 1024;
 static const size_t kGuidSize = 32;  // 128 bits = 32 chars in hex.
 static const size_t kDistroSize = 128;
@@ -24,10 +24,13 @@
   unsigned guid_length;
   const char* distro;
   unsigned distro_length;
+  bool upload;
 };
 
-extern int UploadCrashDump(const BreakpadInfo& info);
+extern int HandleCrashDump(const BreakpadInfo& info);
+#endif  // defined(USE_LINUX_BREAKPAD)
 
+#if defined(GOOGLE_CHROME_BUILD)
 // Checks that the kernel's core filename pattern is "core" and moves the
 // current working directory to a temp directory.
 // Returns true iff core dumping has been successfully enabled for the current