Increasing the Breakpad stack walker max scan limit from 30 to 40.

src/processor/stackwalker_arm_unittest.cc

 // Copyright (c) 2010, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 352 matching lines @@
     .Append(96, 0)                      // more space
 
     .D32(return_address1)               // actual return address
     // frame 1
     .Mark(&frame1_sp)
     .Append(32, 0)                      // space
 
     .D32(0xF0000000)                    // more junk
     .D32(0x0000000D)
 
-    .Append(96, 0)                      // more space
+    .Append(136, 0)                     // more space
 
     .D32(return_address2)               // actual return address
                                         // (won't be found)
     // frame 2
     .Mark(&frame2_sp)
     .Append(32, 0);                     // end of stack
   RegionFromSection();
 
   raw_context.iregs[MD_CONTEXT_ARM_REG_PC] = 0x40005510;
   raw_context.iregs[MD_CONTEXT_ARM_REG_SP] = stack_section.start().Value();
@@ skipping 581 matching lines @@
   ASSERT_EQ((StackFrameARM::CONTEXT_VALID_PC |
              StackFrameARM::CONTEXT_VALID_LR |
              StackFrameARM::RegisterValidFlag(MD_CONTEXT_ARM_REG_IOS_FP) |
              StackFrameARM::CONTEXT_VALID_SP),
             frame2->context_validity);
   EXPECT_EQ(return_address2, frame2->context.iregs[MD_CONTEXT_ARM_REG_PC]);
   EXPECT_EQ(0U, frame2->context.iregs[MD_CONTEXT_ARM_REG_LR]);
   EXPECT_EQ(frame2_sp.Value(), frame2->context.iregs[MD_CONTEXT_ARM_REG_SP]);
   EXPECT_EQ(0U, frame2->context.iregs[MD_CONTEXT_ARM_REG_IOS_FP]);
 }