Update to Chromium revision 280796.

- Mac: Remove Carbon interpose library (see http://crbug.com/157130).
- Remove unused LOGSEVERITY_ERROR_REPORT value (see http://crbug.com/352378).
- CefURLRequest in the render process will now always have the UR_FLAG_REPORT_LOAD_TIMING flag set (see http://crbug.com/376025#c15).
- Change CefGeolocationHandler::OnRequestGeolocationPermission return value from void to boolean.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1753 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

patch/patches/build.patch

@@ -1,6 +1,6 @@
 Index: mac/strip_save_dsym
 ===================================================================
---- mac/strip_save_dsym	(revision 275973)
+--- mac/strip_save_dsym	(revision 280796)
 +++ mac/strip_save_dsym	(working copy)
 @@ -48,7 +48,7 @@
                   "bundle"]
@@ -13,9 +13,9 @@ Index: mac/strip_save_dsym
    archs = []
 Index: gyp_chromium
 ===================================================================
---- gyp_chromium	(revision 275973)
+--- gyp_chromium	(revision 280796)
 +++ gyp_chromium	(working copy)
-@@ -251,12 +251,6 @@
+@@ -257,12 +257,6 @@
    if sys.platform not in ('darwin',):
      args.append('--no-circular-check')
  
@@ -30,7 +30,7 @@ Index: gyp_chromium
    # Also default to ninja on mac, but only when not building chrome/ios.
 Index: common.gypi
 ===================================================================
---- common.gypi	(revision 275973)
+--- common.gypi	(revision 280796)
 +++ common.gypi	(working copy)
 @@ -9,6 +9,9 @@
    # Variables expected to be overriden on the GYP command line (-D) or by
@@ -42,7 +42,7 @@ Index: common.gypi
      # Putting a variables dict inside another variables dict looks kind of
      # weird.  This is done so that 'host_arch', 'chromeos', etc are defined as
      # variables within the outer variables dict here.  This is necessary
-@@ -5058,6 +5061,9 @@
+@@ -5175,6 +5178,9 @@
            # removed as code is fixed.
            4100, 4121, 4125, 4127, 4130, 4131, 4189, 4201, 4238, 4244, 4245,
            4310, 4428, 4481, 4505, 4510, 4512, 4530, 4610, 4611, 4701, 4706,