Bug 978861: disable prefillWithSelection on OSX by default, fix its semantics when enabled. r=ehsan, a=sylvestre.

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extra : transplant_source : %7E%A3%0Fp%CC%D6%18%0B%ED%24l%CF%B2%B3X%B6.%0F6%E5
Bug 1000079 - Nullcheck to avoid Windows overwriting length 0 string. r=bsmedberg, a=lsblakk
Bug 1000960 - IonMonkey (ARM): Correct the order of the operands in moveFloat32. r=mjrosenb, a=sledru
Bug 1000598 - Clear TypeCompartment tables. r=billm, a=sledru
Bug 1005578 - Change nsIURI object from nsStandardURL to nsJSURI when calling url.href. r=bz, a=sledru
Bug 1004576 - Background tabs are unreadable when the Color Intensity of the window frame is at or near its lowest point (white text on light-grey window frame). r=Gijs a=sledru
Merge mozilla-beta to b2g30. a=merge